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Environmental Treaties and Resource Indicators (ENTRI) -- Full Text File


For related treaties, see: Summary of the "International Convention for the Prevention of Pollution From Ships, 1973" is available from the UNEP Register of International Treaties and Other Agreements in the Field of the Environment.

See the ENTRI query system for information about the status of this treaty.


See the ENTRI thematic guide for more information about the relationships between environmental treaties, national resource indicators, and remotely sensed data.
INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escap
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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Environmental Treaties and Resource Indicators (ENTRI) -- Full Text File


For related treaties, see: Summary of the "International Convention for the Prevention of Pollution From Ships, 1973" is available from the UNEP Register of International Treaties and Other Agreements in the Field of the Environment.

See the ENTRI query system for information about the status of this treaty.


See the ENTRI thematic guide for more information about the relationships between environmental treaties, national resource indicators, and remotely sensed data.
INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Art
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




This data access service is provided by the Center  for International Earth Science Information Network (CIESIN), which operates the Socioeconomic Data and Applications Center (SEDAC) for the U.S. National Aeronautics and Space Administration (NASA).
Service Providers

Environmental Treaties and Resource Indicators (ENTRI) -- Full Text File


For related treaties, see: Summary of the "International Convention for the Prevention of Pollution From Ships, 1973" is available from the UNEP Register of International Treaties and Other Agreements in the Field of the Environment.

See the ENTRI query system for information about the status of this treaty.


See the ENTRI thematic guide for more information about the relationships between environmental treaties, national resource indicators, and remotely sensed data.
INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to whic
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




This data access service is provided by the Center  for International Earth Science Information Network (CIESIN), which operates the Socioeconomic Data and Applications Center (SEDAC) for the U.S. National Aeronautics and Space Administration (NASA).
Service Providers

Environmental Treaties and Resource Indicators (ENTRI) -- Full Text File


For related treaties, see: Summary of the "International Convention for the Prevention of Pollution From Ships, 1973" is available from the UNEP Register of International Treaties and Other Agreements in the Field of the Environment.

See the ENTRI query system for information about the status of this treaty.


See the ENTRI thematic guide for more information about the relationships between environmental treaties, national resource indicators, and remotely sensed data.
INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show th
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with par
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




This data access service is provided by the Center  for International Earth Science Information Network (CIESIN), which operates the Socioeconomic Data and Applications Center (SEDAC) for the U.S. National Aeronautics and Space Administration (NASA).
Service Providers

Environmental Treaties and Resource Indicators (ENTRI) -- Full Text File


For related treaties, see: Summary of the "International Convention for the Prevention of Pollution From Ships, 1973" is available from the UNEP Register of International Treaties and Other Agreements in the Field of the Environment.

See the ENTRI query system for information about the status of this treaty.


See the ENTRI thematic guide for more information about the relationships between environmental treaties, national resource indicators, and remotely sensed data.
INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided fo
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine enviro
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of th
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The 
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control 
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Org
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer an
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterrane
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
ot
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 Januar
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control s
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of parag
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
cont
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately bef
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a 
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breac
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangement
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other Parties to the Convention.


Regulation 24

LIMITATION OF SIZE AND ARRANGEMENT OF CARGO TANKS

1. Every new oil tanker shall comply with the provision of 
this Regulation. Every existing oil tanker shall be required, 
within two years after the date of entry into force of the 
present Convention,
to comply with the provisions of this Regulation if such a 
tanker falls into either of the following categories:

a) a tanker, the delivery of which is after 1 January 1977; 
or

b) a tanker to which both the following conditions apply:

(i) delivery is not later than 1 January 1977; and

(ii) the building contract is placed after 1 January 1974, or 
in cases where no building contract has previously been 
placed, the keel is laid or the tanker is at a similar stage 
of construction after 30 January 1974.

2. Cargo tanks of oil tankers shall be of such size and 
arrangements that the hypothetical outflow Oc or Os 
calculated in accordance with the provisions of Regulation 23 
of this Annex anywhere in the length of the ship does not 
exceed 30,000 cubic metres or 400 x cube root of DW, 
whichever is the greater, but subject to a maximum of 40,000 
cubic metres.

3. The volume of any one wing cargo oil tank of an oil tanker 
shall not exceed seventy-five per cent of the limits of the 
hypothetical oil outflow referred to in paragraph (2) of this 
Regulation. The volume of any one centre cargo oil tank shall 
not exceed 50,000 cubic metres. However, in segregated 
ballast oil tankers as defined in Regulation 13 of this 
Annex, the permitted volume of a wing cargo oil tank situated 
between two segregated ballast tanks, each exceeding lc in 
length, may be increased to the maximum limit of hypothetical 
oil outflow provided that the width of the wing tanks exceeds 
tc.

4. The length of each cargo tank shall not exceed 10 metres 
or one of the following values, whichever is the greater:
a) where no longitudinal bulkhead is provided:
  
   0.1L

b) where a longitudinal bulkhead is provided at the 
centreline only:
  
   0.15L

c) where two or more longitudinal bulkheads are provided:

(i) for wing tanks:
    0.2L 

(ii) for centre tanks:
     (1) if bi Ñ B is equal to or greater than 1/5:

     0.2L B

     (2) if bi/B is less than 1/5:

Ñ where no centreline longitudinal bulkhead is    
provided:
       
    (0.5 bi/B + 0.1)L

Ñwhere a centreline longitudinal bulkhead is provided:
     
(0.25 bi/B + 0.15)L

5. In order not to exceed the volume limits established by 
paragraphs (2), (3) and (4) of this Regulation and 
irrespective of the accepted type of cargo transfer system 
installed, when such a system inter-connects two or more 
cargo tanks, valves or
other similar closing devices shall be provided for 
separating the tanks from each other. These valves or devices 
shall be closed when the tanker is at sea. 

6. Lines of piping which run through cargo tanks
in a position less than tc from the ship's side or less than 
vc from the ship's bottom shall be fitted with valves or 
similar closing devices at the point at which they open into 
any cargo tank. These valves shall be kept closed at sea at 
any time when the tanks contain cargo oil, except that they 
may be opened only for cargo transfer needed for the purpose 
of trimming of the ship.


Regulation 25

SUBDIVISION AND STABILITY

1. Every new oil tanker shall comply with the subdivision and 
damage stability criteria as specified in paragraph (3) of 
this Regulation, after the assumed side or bottom damage as 
specified in paragraph (2) of this Regualtion, for any 
operating draught reflecting actual partial or full load 
conditions consistent with trim and strength of the ship as 
well as specific gravities of the cargo. Such damage shall be 
applied to all conceivable locations along the length of the 
ship as follows:

a) in tankers of more than 225 metres in length, anywhere in 
the ship's length;

b) in tankers of more than 150 metres, but not exceeding 225 
metres in length, anywhere in the ship's length except 
involving e
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other Parties to the Convention.


Regulation 24

LIMITATION OF SIZE AND ARRANGEMENT OF CARGO TANKS

1. Every new oil tanker shall comply with the provision of 
this Regulation. Every existing oil tanker shall be required, 
within two years after the date of entry into force of the 
present Convention,
to comply with the provisions of this Regulation if such a 
tanker falls into either of the following categories:

a) a tanker, the delivery of which is after 1 January 1977; 
or

b) a tanker to which both the following conditions apply:

(i) delivery is not later than 1 January 1977; and

(ii) the building contract is placed after 1 January 1974, or 
in cases where no building contract has previously been 
placed, the keel is laid or the tanker is at a similar stage 
of construction after 30 January 1974.

2. Cargo tanks of oil tankers shall be of such size and 
arrangements that the hypothetical outflow Oc or Os 
calculated in accordance with the provisions of Regulation 23 
of this Annex anywhere in the length of the ship does not 
exceed 30,000 cubic metres or 400 x cube root of DW, 
whichever is the greater, but subject to a maximum of 40,000 
cubic metres.

3. The volume of any one wing cargo oil tank of an oil tanker 
shall not exceed seventy-five per cent of the limits of the 
hypothetical oil outflow referred to in paragraph (2) of this 
Regulation. The volume of any one centre cargo oil tank shall 
not exceed 50,000 cubic metres. However, in segregated 
ballast oil tankers as defined in Regulation 13 of this 
Annex, the permitted volume of a wing cargo oil tank situated 
between two segregated ballast tanks, each exceeding lc in 
length, may be increased to the maximum limit of hypothetical 
oil outflow provided that the width of the wing tanks exceeds 
tc.

4. The length of each cargo tank shall not exceed 10 metres 
or one of the following values, whichever is the greater:
a) where no longitudinal bulkhead is provided:
  
   0.1L

b) where a longitudinal bulkhead is provided at the 
centreline only:
  
   0.15L

c) where two or more longitudinal bulkheads are provided:

(i) for wing tanks:
    0.2L 

(ii) for centre tanks:
     (1) if bi Ñ B is equal to or greater than 1/5:

     0.2L B

     (2) if bi/B is less than 1/5:

Ñ where no centreline longitudinal bulkhead is    
provided:
       
    (0.5 bi/B + 0.1)L

Ñwhere a centreline longitudinal bulkhead is provided:
     
(0.25 bi/B + 0.15)L

5. In order not to exceed the volume limits established by 
paragraphs (2), (3) and (4) of this Regulation and 
irrespective of the accepted type of cargo transfer system 
installed, when such a system inter-connects two or more 
cargo tanks, valves or
other similar closing devices shall be provided for 
separating the tanks from each other. These valves or devices 
shall be closed when the tanker is at sea. 

6. Lines of piping which run through cargo tanks
in a position less than tc from the ship's side or less than 
vc from the ship's bottom shall be fitted with valves or 
similar closing devices at the point at which they open into 
any cargo tank. These valves shall be kept closed at sea at 
any time when the tanks contain cargo oil, except that they 
may be opened only for cargo transfer needed for the purpose 
of trimming of the ship.


Regulation 25

SUBDIVISION AND STABILITY

1. Every new oil tanker shall comply with the subdivision and 
damage stability criteria as specified in paragraph (3) of 
this Regulation, after the assumed side or bottom damage as 
specified in paragraph (2) of this Regualtion, for any 
operating draught reflecting actual partial or full load 
conditions consistent with trim and strength of the ship as 
well as specific gravities of the cargo. Such damage shall be 
applied to all conceivable locations along the length of the 
ship as follows:

a) in tankers of more than 225 metres in length, anywhere in 
the ship's length;

b) in tankers of more than 150 metres, but not exceeding 225 
metres in length, anywhere in the ship's length except 
involving either after or forward bulkhead bounding the 
machinery space located aft. The machinery space shall be 
treated as a single floodable compartment;

c) in tankers not exceeding 150 metres in length,
anywhere in the ship's length between adjacent transverse 
bulkheads with the exception of the machinery space. For 
tankers of 100 metres or less in length where all 
requirements of paragraph (3) of this Regulation cannot be 
fulfilled without materially impairing the operational 
qualities of the ship, Administrations may allow relaxations 
from these requirements.

Ballast conditions where the tanker is not carrying oil in 
cargo tanks excluding any oil residues, shall not be 
considered.

2. The following provisions regarding the extent and the 
character of the assumed damage shall apply:

a) The extent of side or bottom damage shall be as specified 
in Regulation 22 of this Annex, except that the longitudinal 
extent of the bottom damage within 0.3L from the forward 
perpendicular shall be the same as for side damage, as 
specified in Regulation 22 (1)(a)(i) of this Annex. If any 
damage of lesser extent results in a more severe condition 
such damage shall be assumed.

b) Where the damage involving transverse bulkheads is 
envisaged as specified in subparagraphs (1)(a) and (b) of 
this Regulation, transverse watertight bulkheads shall be 
spaced at least at a distance equal to the longitudinal 
extent of assumed damage specified in sub-paragraph (a) of 
this paragraph in order to be considered effective. Where 
transverse bulkheads are spaced at a lesser distance, one or 
more of these bulkheads within such extent of damage shall be 
assumed as non-existent for the purpose of determining 
flooded compartments.

c) Where the damage between adjacent transverse watertight 
bulkheads is envisaged as specified in sub-paragraph (1)(c) 
of this Regulation, no main transverse bulkhead or a 
transverse bulkhead bounding side tanks or double bottom 
tanks shall be assumed damaged, unless:

(i) the spacing of the adjacent bulkheads is less than the 
longitudinal extent of assumed damage specified in sub-
paragraph (a) of this paragraph; or
(ii) there is a step or a recess in a transverse bulkhead of 
more than 3.05 metres in length, located within the extent of 
penetration of assumed damage. The step forward by the after 
peak bulkhead and after peak tank top shall not be regarded 
as a step for the purpose of this Regulation.

d) If pipes, ducts or tunnels are situated within the assumed 
extent of damage, arrangements shall be made so that 
progressive flooding cannot thereby extend to compartments 
other than those assumed to be floodable for each case of 
damage.

3. Oil tankers shall be regarded as complying with the damage 
stability criteria if the following requirements are met:

a) The final waterline, taking into account sinkage, heel and 
trim, shall be below the lower edge of any opening through 
which progressive flooding may take place. Such openings 
shall include air pipes and those which are closed by means 
of weathertight doors or hatch covers and may exclude those 
openings closed by means of watertight manhole covers and 
flush scuttles, small watertight cargo tank hatch covers 
which maintain the high integrity of the deck, remotely 
operated watertight sliding doors, and side scuttles of the 
non-opening type,

b) In the final stage of flooding, the angle of heel due to 
unsymmetrical flooding shall not exceed 25 degrees, provided 
that this angle may be increased up to 30 degrees if no deck 
edge immersion occurs.

c) The stability in the final stage of flooding shall be 
investigated and may be regarded as sufficient if the 
righting lever curve has at least a range of 20 degrees 
beyond the position of equilibrium in association with a 
maximum residual righting lever of at least 0.1 metre. The 
Administration shall give consideration to the potential 
hazard presented by protected or unprotected openings which 
may become temporarily immersed within the range of residual 
stability.

d) The Administra
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other Parties to the Convention.


Regulation 24

LIMITATION OF SIZE AND ARRANGEMENT OF CARGO TANKS

1. Every new oil tanker shall comply with the provision of 
this Regulation. Every existing oil tanker shall be required, 
within two years after the date of entry into force of the 
present Convention,
to comply with the provisions of this Regulation if such a 
tanker falls into either of the following categories:

a) a tanker, the delivery of which is after 1 January 1977; 
or

b) a tanker to which both the following conditions apply:

(i) delivery is not later than 1 January 1977; and

(ii) the building contract is placed after 1 January 1974, or 
in cases where no building contract has previously been 
placed, the keel is laid or the tanker is at a similar stage 
of construction after 30 January 1974.

2. Cargo tanks of oil tankers shall be of such size and 
arrangements that the hypothetical outflow Oc or Os 
calculated in accordance with the provisions of Regulation 23 
of this Annex anywhere in the length of the ship does not 
exceed 30,000 cubic metres or 400 x cube root of DW, 
whichever is the greater, but subject to a maximum of 40,000 
cubic metres.

3. The volume of any one wing cargo oil tank of an oil tanker 
shall not exceed seventy-five per cent of the limits of the 
hypothetical oil outflow referred to in paragraph (2) of this 
Regulation. The volume of any one centre cargo oil tank shall 
not exceed 50,000 cubic metres. However, in segregated 
ballast oil tankers as defined in Regulation 13 of this 
Annex, the permitted volume of a wing cargo oil tank situated 
between two segregated ballast tanks, each exceeding lc in 
length, may be increased to the maximum limit of hypothetical 
oil outflow provided that the width of the wing tanks exceeds 
tc.

4. The length of each cargo tank shall not exceed 10 metres 
or one of the following values, whichever is the greater:
a) where no longitudinal bulkhead is provided:
  
   0.1L

b) where a longitudinal bulkhead is provided at the 
centreline only:
  
   0.15L

c) where two or more longitudinal bulkheads are provided:

(i) for wing tanks:
    0.2L 

(ii) for centre tanks:
     (1) if bi Ñ B is equal to or greater than 1/5:

     0.2L B

     (2) if bi/B is less than 1/5:

Ñ where no centreline longitudinal bulkhead is    
provided:
       
    (0.5 bi/B + 0.1)L

Ñwhere a centreline longitudinal bulkhead is provided:
     
(0.25 bi/B + 0.15)L

5. In order not to exceed the volume limits established by 
paragraphs (2), (3) and (4) of this Regulation and 
irrespective of the accepted type of cargo transfer system 
installed, when such a system inter-connects two or more 
cargo tanks, valves or
other similar closing devices shall be provided for 
separating the tanks from each other. These valves or devices 
shall be closed when the tanker is at sea. 

6. Lines of piping which run through cargo tanks
in a position less than tc from the ship's side or less than 
vc from the ship's bottom shall be fitted with valves or 
similar closing devices at the point at which they open into 
any cargo tank. These valves shall be kept closed at sea at 
any time when the tanks contain cargo oil, except that they 
may be opened only for cargo transfer needed for the purpose 
of trimming of the ship.


Regulation 25

SUBDIVISION AND STABILITY

1. Every new oil tanker shall comply with the subdivision and 
damage stability criteria as specified in paragraph (3) of 
this Regulation, after the assumed side or bottom damage as 
specified in paragraph (2) of this Regualtion, for any 
operating draught reflecting actual partial or full load 
conditions consistent with trim and strength of the ship as 
well as specific gravities of the cargo. Such damage shall be 
applied to all conceivable locations along the length of the 
ship as follows:

a) in tankers of more than 225 metres in length, anywhere in 
the ship's length;

b) in tankers of more than 150 metres, but not exceeding 225 
metres in length, anywhere in the ship's length except 
involving either after or forward bulkhead bounding the 
machinery space located aft. The machinery space shall be 
treated as a single floodable compartment;

c) in tankers not exceeding 150 metres in length,
anywhere in the ship's length between adjacent transverse 
bulkheads with the exception of the machinery space. For 
tankers of 100 metres or less in length where all 
requirements of paragraph (3) of this Regulation cannot be 
fulfilled without materially impairing the operational 
qualities of the ship, Administrations may allow relaxations 
from these requirements.

Ballast conditions where the tanker is not carrying oil in 
cargo tanks excluding any oil residues, shall not be 
considered.

2. The following provisions regarding the extent and the 
character of the assumed damage shall apply:

a) The extent of side or bottom damage shall be as specified 
in Regulation 22 of this Annex, except that the longitudinal 
extent of the bottom damage within 0.3L from the forward 
perpendicular shall be the same as for side damage, as 
specified in Regulation 22 (1)(a)(i) of this Annex. If any 
damage of lesser extent results in a more severe condition 
such damage shall be assumed.

b) Where the damage involving transverse bulkheads is 
envisaged as specified in subparagraphs (1)(a) and (b) of 
this Regulation, transverse watertight bulkheads shall be 
spaced at least at a distance equal to the longitudinal 
extent of assumed damage specified in sub-paragraph (a) of 
this paragraph in order to be considered effective. Where 
transverse bulkheads are spaced at a lesser distance, one or 
more of these bulkheads within such extent of damage shall be 
assumed as non-existent for the purpose of determining 
flooded compartments.

c) Where the damage between adjacent transverse watertight 
bulkheads is envisaged as specified in sub-paragraph (1)(c) 
of this Regulation, no main transverse bulkhead or a 
transverse bulkhead bounding side tanks or double bottom 
tanks shall be assumed damaged, unless:

(i) the spacing of the adjacent bulkheads is less than the 
longitudinal extent of assumed damage specified in sub-
paragraph (a) of this paragraph; or
(ii) there is a step or a recess in a transverse bulkhead of 
more than 3.05 metres in length, located within the extent of 
penetration of assumed damage. The step forward by the after 
peak bulkhead and after peak tank top shall not be regarded 
as a step for the purpose of this Regulation.

d) If pipes, ducts or tunnels are situated within the assumed 
extent of damage, arrangements shall be made so that 
progressive flooding cannot thereby extend to compartments 
other than those assumed to be floodable for each case of 
damage.

3. Oil tankers shall be regarded as complying with the damage 
stability criteria if the following requirements are met:

a) The final waterline, taking into account sinkage, heel and 
trim, shall be below the lower edge of any opening through 
which progressive flooding may take place. Such openings 
shall include air pipes and those which are closed by means 
of weathertight doors or hatch covers and may exclude those 
openings closed by means of watertight manhole covers and 
flush scuttles, small watertight cargo tank hatch covers 
which maintain the high integrity of the deck, remotely 
operated watertight sliding doors, and side scuttles of the 
non-opening type,

b) In the final stage of flooding, the angle of heel due to 
unsymmetrical flooding shall not exceed 25 degrees, provided 
that this angle may be increased up to 30 degrees if no deck 
edge immersion occurs.

c) The stability in the final stage of flooding shall be 
investigated and may be regarded as sufficient if the 
righting lever curve has at least a range of 20 degrees 
beyond the position of equilibrium in association with a 
maximum residual righting lever of at least 0.1 metre. The 
Administration shall give consideration to the potential 
hazard presented by protected or unprotected openings which 
may become temporarily immersed within the range of residual 
stability.

d) The Administration shall be satisfied that the stability 
is sufficient during intermediate stages of flooding.

4. The requirements of paragraph (1) of this Regulation shall 
be confirmed by calculations which take into consideration 
the design characteristics of the ship, the arrangements, 
configuration and contents of the damaged compartments; and 
the distribution, specific gravities and the free surface 
effect of liquids. The calculations shall be based on the 
following:

a) Account shall be taken of any empty or partially filled 
tank, the specific gravity of cargoes carried, as well as any 
outflow of liquids from damaged compartments.

b) The permeabilities are assumed as follows:

Spaces	              Permeability

Appropriated to	     0.60
 stores

Occupied by	          0.95
 accommodation

Occupied by machinery   0.85

Voids	               0.95

Intended for	          0 to 0.95*
 consumable liquids

Intended for	          0 to 0.95**
 other liquids

* Whichever results in the more severe requirements.

** The permeability of partially filled compartments shall be 
consistent with the amount of liquid carried.

c) The buoyancy of any superstructure directly above the side 
damage shall be disregarded. The unflooded parts of 
superstructures beyond the extent of damage, however, may be 
taken into consideration provided that they are separated 
from the damaged space by watertight bulkheads and the 
requirements of sub-paragraph (3)(a) of this Regulation in 
respect of these intact spaces are complied with. Hinged 
watertight doors may be acceptable in watertight bulkheads in 
the superstructure.

d) The free surface effect shall be calculated at an angle of 
heel of 5 degrees for each individual compartment. The 
Administration may require or allow the free surface 
corrections to be calculated at an angle of heel greater than 
5 degrees for partially filled tanks.

e) In calculating the effect of free surfaces of consumable 
liquids it shall be assumed that, for each type of liquid at 
least one transverse pair or a single centreline tank has a 
free surface and the tank or combination of tanks to be taken 
into account shall be those where the effect of free surfaces 
is the greatest.

5. The Master of every oil tanker and the person in charge of 
a non-self-propelled oil tanker to which this Annex applies 
shall be supplied in an approved form with:

a) information relative to loading and distribution of cargo 
necessary to ensure compliance with the provisions of this 
Regulation; and

b) data on the ability of the ship to comply with damage 
stability criteria as determined by this Regulation, 
including the effect of relaxations that may have been 
allowed under sub-paragraph (1)(c) of this Regulation.


                     APPENDIX I

                       LIST OF OILS*

* The list of oils shall not necessarily be considered as 
comprehensive.

Asphalt solutions
Blending Stocks
Roofers Flux
Straight Run Residue

Oils
Clarified
Crude Oil
Mixtures containing crude oil
Diesel Oil
Fuel Oil No. 4
Fuel Oil No. 5
Fuel Oil No. 6
Road Oil
Transformer Oil
Aromatic Oil (excluding vegetable oil)
Lubricating Oils and Blending Stocks
Mineral Oil
Motor Oil
Penetrating Oil
Spindle Oil
Turbine Oil

Distillates
Straight Run
Flashed Feed Stocks

Gas Oil
Cracked

Gasoline Blending Stocks
Aklylates Ñ fuel
Reformates
Polymer Ñ fuel

Gasolines
Casinghead (natural)
Automotive
Aviation
Straight Run
Fuel Oil No. 1 (Kerosene)
Fuel Oil No. 1-D
Fuel Oil No. 2
Fuel Oil No. 2-D

Jet Fuels
JP-1 (Kerosene)
JP-3
JP-4
JP-5 (Kerosene, Heavy)
Turbo Fuel
Kerosene
Mineral Spirit

Naphtha
Solvent
Petroleum
Heartcut Distillate Oil


APPENDIX II

Form of Certificate


INTERNATIONAL OIL PREVENTION CERTIFICATE (1973)

Issued under the Provisions of the International Convention 
for the Prevention of Pollution from Ships, 1973, under the 
Authority of the Government of

...................................................
(full designation of the country)

by ............................................... (full 
designation of the competent person or organ
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other Parties to the Convention.


Regulation 24

LIMITATION OF SIZE AND ARRANGEMENT OF CARGO TANKS

1. Every new oil tanker shall comply with the provision of 
this Regulation. Every existing oil tanker shall be required, 
within two years after the date of entry into force of the 
present Convention,
to comply with the provisions of this Regulation if such a 
tanker falls into either of the following categories:

a) a tanker, the delivery of which is after 1 January 1977; 
or

b) a tanker to which both the following conditions apply:

(i) delivery is not later than 1 January 1977; and

(ii) the building contract is placed after 1 January 1974, or 
in cases where no building contract has previously been 
placed, the keel is laid or the tanker is at a similar stage 
of construction after 30 January 1974.

2. Cargo tanks of oil tankers shall be of such size and 
arrangements that the hypothetical outflow Oc or Os 
calculated in accordance with the provisions of Regulation 23 
of this Annex anywhere in the length of the ship does not 
exceed 30,000 cubic metres or 400 x cube root of DW, 
whichever is the greater, but subject to a maximum of 40,000 
cubic metres.

3. The volume of any one wing cargo oil tank of an oil tanker 
shall not exceed seventy-five per cent of the limits of the 
hypothetical oil outflow referred to in paragraph (2) of this 
Regulation. The volume of any one centre cargo oil tank shall 
not exceed 50,000 cubic metres. However, in segregated 
ballast oil tankers as defined in Regulation 13 of this 
Annex, the permitted volume of a wing cargo oil tank situated 
between two segregated ballast tanks, each exceeding lc in 
length, may be increased to the maximum limit of hypothetical 
oil outflow provided that the width of the wing tanks exceeds 
tc.

4. The length of each cargo tank shall not exceed 10 metres 
or one of the following values, whichever is the greater:
a) where no longitudinal bulkhead is provided:
  
   0.1L

b) where a longitudinal bulkhead is provided at the 
centreline only:
  
   0.15L

c) where two or more longitudinal bulkheads are provided:

(i) for wing tanks:
    0.2L 

(ii) for centre tanks:
     (1) if bi Ñ B is equal to or greater than 1/5:

     0.2L B

     (2) if bi/B is less than 1/5:

Ñ where no centreline longitudinal bulkhead is    
provided:
       
    (0.5 bi/B + 0.1)L

Ñwhere a centreline longitudinal bulkhead is provided:
     
(0.25 bi/B + 0.15)L

5. In order not to exceed the volume limits established by 
paragraphs (2), (3) and (4) of this Regulation and 
irrespective of the accepted type of cargo transfer system 
installed, when such a system inter-connects two or more 
cargo tanks, valves or
other similar closing devices shall be provided for 
separating the tanks from each other. These valves or devices 
shall be closed when the tanker is at sea. 

6. Lines of piping which run through cargo tanks
in a position less than tc from the ship's side or less than 
vc from the ship's bottom shall be fitted with valves or 
similar closing devices at the point at which they open into 
any cargo tank. These valves shall be kept closed at sea at 
any time when the tanks contain cargo oil, except that they 
may be opened only for cargo transfer needed for the purpose 
of trimming of the ship.


Regulation 25

SUBDIVISION AND STABILITY

1. Every new oil tanker shall comply with the subdivision and 
damage stability criteria as specified in paragraph (3) of 
this Regulation, after the assumed side or bottom damage as 
specified in paragraph (2) of this Regualtion, for any 
operating draught reflecting actual partial or full load 
conditions consistent with trim and strength of the ship as 
well as specific gravities of the cargo. Such damage shall be 
applied to all conceivable locations along the length of the 
ship as follows:

a) in tankers of more than 225 metres in length, anywhere in 
the ship's length;

b) in tankers of more than 150 metres, but not exceeding 225 
metres in length, anywhere in the ship's length except 
involving either after or forward bulkhead bounding the 
machinery space located aft. The machinery space shall be 
treated as a single floodable compartment;

c) in tankers not exceeding 150 metres in length,
anywhere in the ship's length between adjacent transverse 
bulkheads with the exception of the machinery space. For 
tankers of 100 metres or less in length where all 
requirements of paragraph (3) of this Regulation cannot be 
fulfilled without materially impairing the operational 
qualities of the ship, Administrations may allow relaxations 
from these requirements.

Ballast conditions where the tanker is not carrying oil in 
cargo tanks excluding any oil residues, shall not be 
considered.

2. The following provisions regarding the extent and the 
character of the assumed damage shall apply:

a) The extent of side or bottom damage shall be as specified 
in Regulation 22 of this Annex, except that the longitudinal 
extent of the bottom damage within 0.3L from the forward 
perpendicular shall be the same as for side damage, as 
specified in Regulation 22 (1)(a)(i) of this Annex. If any 
damage of lesser extent results in a more severe condition 
such damage shall be assumed.

b) Where the damage involving transverse bulkheads is 
envisaged as specified in subparagraphs (1)(a) and (b) of 
this Regulation, transverse watertight bulkheads shall be 
spaced at least at a distance equal to the longitudinal 
extent of assumed damage specified in sub-paragraph (a) of 
this paragraph in order to be considered effective. Where 
transverse bulkheads are spaced at a lesser distance, one or 
more of these bulkheads within such extent of damage shall be 
assumed as non-existent for the purpose of determining 
flooded compartments.

c) Where the damage between adjacent transverse watertight 
bulkheads is envisaged as specified in sub-paragraph (1)(c) 
of this Regulation, no main transverse bulkhead or a 
transverse bulkhead bounding side tanks or double bottom 
tanks shall be assumed damaged, unless:

(i) the spacing of the adjacent bulkheads is less than the 
longitudinal extent of assumed damage specified in sub-
paragraph (a) of this paragraph; or
(ii) there is a step or a recess in a transverse bulkhead of 
more than 3.05 metres in length, located within the extent of 
penetration of assumed damage. The step forward by the after 
peak bulkhead and after peak tank top shall not be regarded 
as a step for the purpose of this Regulation.

d) If pipes, ducts or tunnels are situated within the assumed 
extent of damage, arrangements shall be made so that 
progressive flooding cannot thereby extend to compartments 
other than those assumed to be floodable for each case of 
damage.

3. Oil tankers shall be regarded as complying with the damage 
stability criteria if the following requirements are met:

a) The final waterline, taking into account sinkage, heel and 
trim, shall be below the lower edge of any opening through 
which progressive flooding may take place. Such openings 
shall include air pipes and those which are closed by means 
of weathertight doors or hatch covers and may exclude those 
openings closed by means of watertight manhole covers and 
flush scuttles, small watertight cargo tank hatch covers 
which maintain the high integrity of the deck, remotely 
operated watertight sliding doors, and side scuttles of the 
non-opening type,

b) In the final stage of flooding, the angle of heel due to 
unsymmetrical flooding shall not exceed 25 degrees, provided 
that this angle may be increased up to 30 degrees if no deck 
edge immersion occurs.

c) The stability in the final stage of flooding shall be 
investigated and may be regarded as sufficient if the 
righting lever curve has at least a range of 20 degrees 
beyond the position of equilibrium in association with a 
maximum residual righting lever of at least 0.1 metre. The 
Administration shall give consideration to the potential 
hazard presented by protected or unprotected openings which 
may become temporarily immersed within the range of residual 
stability.

d) The Administration shall be satisfied that the stability 
is sufficient during intermediate stages of flooding.

4. The requirements of paragraph (1) of this Regulation shall 
be confirmed by calculations which take into consideration 
the design characteristics of the ship, the arrangements, 
configuration and contents of the damaged compartments; and 
the distribution, specific gravities and the free surface 
effect of liquids. The calculations shall be based on the 
following:

a) Account shall be taken of any empty or partially filled 
tank, the specific gravity of cargoes carried, as well as any 
outflow of liquids from damaged compartments.

b) The permeabilities are assumed as follows:

Spaces	              Permeability

Appropriated to	     0.60
 stores

Occupied by	          0.95
 accommodation

Occupied by machinery   0.85

Voids	               0.95

Intended for	          0 to 0.95*
 consumable liquids

Intended for	          0 to 0.95**
 other liquids

* Whichever results in the more severe requirements.

** The permeability of partially filled compartments shall be 
consistent with the amount of liquid carried.

c) The buoyancy of any superstructure directly above the side 
damage shall be disregarded. The unflooded parts of 
superstructures beyond the extent of damage, however, may be 
taken into consideration provided that they are separated 
from the damaged space by watertight bulkheads and the 
requirements of sub-paragraph (3)(a) of this Regulation in 
respect of these intact spaces are complied with. Hinged 
watertight doors may be acceptable in watertight bulkheads in 
the superstructure.

d) The free surface effect shall be calculated at an angle of 
heel of 5 degrees for each individual compartment. The 
Administration may require or allow the free surface 
corrections to be calculated at an angle of heel greater than 
5 degrees for partially filled tanks.

e) In calculating the effect of free surfaces of consumable 
liquids it shall be assumed that, for each type of liquid at 
least one transverse pair or a single centreline tank has a 
free surface and the tank or combination of tanks to be taken 
into account shall be those where the effect of free surfaces 
is the greatest.

5. The Master of every oil tanker and the person in charge of 
a non-self-propelled oil tanker to which this Annex applies 
shall be supplied in an approved form with:

a) information relative to loading and distribution of cargo 
necessary to ensure compliance with the provisions of this 
Regulation; and

b) data on the ability of the ship to comply with damage 
stability criteria as determined by this Regulation, 
including the effect of relaxations that may have been 
allowed under sub-paragraph (1)(c) of this Regulation.


                     APPENDIX I

                       LIST OF OILS*

* The list of oils shall not necessarily be considered as 
comprehensive.

Asphalt solutions
Blending Stocks
Roofers Flux
Straight Run Residue

Oils
Clarified
Crude Oil
Mixtures containing crude oil
Diesel Oil
Fuel Oil No. 4
Fuel Oil No. 5
Fuel Oil No. 6
Road Oil
Transformer Oil
Aromatic Oil (excluding vegetable oil)
Lubricating Oils and Blending Stocks
Mineral Oil
Motor Oil
Penetrating Oil
Spindle Oil
Turbine Oil

Distillates
Straight Run
Flashed Feed Stocks

Gas Oil
Cracked

Gasoline Blending Stocks
Aklylates Ñ fuel
Reformates
Polymer Ñ fuel

Gasolines
Casinghead (natural)
Automotive
Aviation
Straight Run
Fuel Oil No. 1 (Kerosene)
Fuel Oil No. 1-D
Fuel Oil No. 2
Fuel Oil No. 2-D

Jet Fuels
JP-1 (Kerosene)
JP-3
JP-4
JP-5 (Kerosene, Heavy)
Turbo Fuel
Kerosene
Mineral Spirit

Naphtha
Solvent
Petroleum
Heartcut Distillate Oil


APPENDIX II

Form of Certificate


INTERNATIONAL OIL PREVENTION CERTIFICATE (1973)

Issued under the Provisions of the International Convention 
for the Prevention of Pollution from Ships, 1973, under the 
Authority of the Government of

...................................................
(full designation of the country)

by ............................................... (full 
designation of the competent person or organization 
authorized under the provisions of the International 
Convention for the Prevention of Pollution from Ships, 1973)

Name of Ship	 Number or
Distinctive    
Letter	Port of
Registry	Gross Tonnage
			
             
Type of ship:

Oil tanker, including combination carrier*

* Delete as appropriate

Asphalt carrier*

Ship other than oil tanker with cargo tanks coming under 
Regulation 2(2) of Annex I of the Convention* Ship other than 
any of the above*

New/existing ship*

Date of building or major conversion contract..............
                         
.........................................................

Date on which keel was laid or ship was at a similar stage of 
construction or on which major conversion was 
commenced....................................................
..................

Date of delivery or completion of major conversion........                   
......................................................


PART A

ALL SHIPS 

The ship is equipped with: 

for ships of 400 tons gross tonnage and above:

a) oily-water separating equipment* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million) or

* Delete as appropriate

b) an oil filtering system* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million)

for ships of 10,000 tons gross tonnage and above: 

c) an oil discharge monitoring and control system* 
(additional to (a) or(b) above) or

d) oil-water separating equipment and an oil filtering 
system* (capable of producing the effluent with an oil 
content not exceeding 15 pars per million) in lieu of (a) or 
(b) above.

Particulars of requirement from which exemption is granted 
under Regulation 2(2) and 2(4)(a) of Annex I of the 
Convention:

...................................................
...................................................

Remarks:



PART B

OIL TANKER

Deadweight ..................metric tons. Length of 
ship...............	metres.

It is certified that this ship is:

a) required to be constructed according to and complies with

b) not required to be constructed according to

c) nor required to be constructed according to, but complies 
with the requirements of Regulation 24 of Annex I of the 
Convention.

The capacity of segregated ballast tanks 
is...................................cubic metres and
complies with the requirements of Regulation 24 of Annex I of 
the Convention 

The segregated ballast is distributed as follows:

Tank 	Quantity	Tank	Quantity
			

    			
This Part should be completed for oil tankers including 
combination carriers and asphalt carriers, and those entries 
which are applicable should be completed for ships other than 
oil tankers which are constructed and utilized to carry oil 
in bulk of an aggregate capacity of 200 cubic metres or 
above.

2 This page need not be reproduced on a Certificate issued to 
any ship other than those referred to in footnote.1

3 Delete as appropriate


THIS IS TO CERTIFY:

That the ship has been surveyed in accordance with Regulation 
4 of Annex I of the International Covention for the 
Prevention of Pollution from Ships, 1973, concerning the 
prevention of pollution of oil; and

That the survey shows that the structure, equipment, 
fittings, arrangements and material of the ship and the 
condition thereof are in all respects, satisfactory and that 
the ship complies with the applicable requirements of Annex I 
of the Convention.

This Certificate is valid until............................

subject to intermediate survey(s) at intervals of .........

Issued at.................................................

                   (place of issue of Certificate)

........................19....   ............................
(Signature of duly                 
authorized official issuing 
the Certificate)

  (Seal or stamp of the issuing Authority, as appropriate)

Endorsement for existing ships4

4 This entry need not be reproduced on a Certificate other 
than the first Certificate issued to any ship.

This is to certify that t
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other Parties to the Convention.


Regulation 24

LIMITATION OF SIZE AND ARRANGEMENT OF CARGO TANKS

1. Every new oil tanker shall comply with the provision of 
this Regulation. Every existing oil tanker shall be required, 
within two years after the date of entry into force of the 
present Convention,
to comply with the provisions of this Regulation if such a 
tanker falls into either of the following categories:

a) a tanker, the delivery of which is after 1 January 1977; 
or

b) a tanker to which both the following conditions apply:

(i) delivery is not later than 1 January 1977; and

(ii) the building contract is placed after 1 January 1974, or 
in cases where no building contract has previously been 
placed, the keel is laid or the tanker is at a similar stage 
of construction after 30 January 1974.

2. Cargo tanks of oil tankers shall be of such size and 
arrangements that the hypothetical outflow Oc or Os 
calculated in accordance with the provisions of Regulation 23 
of this Annex anywhere in the length of the ship does not 
exceed 30,000 cubic metres or 400 x cube root of DW, 
whichever is the greater, but subject to a maximum of 40,000 
cubic metres.

3. The volume of any one wing cargo oil tank of an oil tanker 
shall not exceed seventy-five per cent of the limits of the 
hypothetical oil outflow referred to in paragraph (2) of this 
Regulation. The volume of any one centre cargo oil tank shall 
not exceed 50,000 cubic metres. However, in segregated 
ballast oil tankers as defined in Regulation 13 of this 
Annex, the permitted volume of a wing cargo oil tank situated 
between two segregated ballast tanks, each exceeding lc in 
length, may be increased to the maximum limit of hypothetical 
oil outflow provided that the width of the wing tanks exceeds 
tc.

4. The length of each cargo tank shall not exceed 10 metres 
or one of the following values, whichever is the greater:
a) where no longitudinal bulkhead is provided:
  
   0.1L

b) where a longitudinal bulkhead is provided at the 
centreline only:
  
   0.15L

c) where two or more longitudinal bulkheads are provided:

(i) for wing tanks:
    0.2L 

(ii) for centre tanks:
     (1) if bi Ñ B is equal to or greater than 1/5:

     0.2L B

     (2) if bi/B is less than 1/5:

Ñ where no centreline longitudinal bulkhead is    
provided:
       
    (0.5 bi/B + 0.1)L

Ñwhere a centreline longitudinal bulkhead is provided:
     
(0.25 bi/B + 0.15)L

5. In order not to exceed the volume limits established by 
paragraphs (2), (3) and (4) of this Regulation and 
irrespective of the accepted type of cargo transfer system 
installed, when such a system inter-connects two or more 
cargo tanks, valves or
other similar closing devices shall be provided for 
separating the tanks from each other. These valves or devices 
shall be closed when the tanker is at sea. 

6. Lines of piping which run through cargo tanks
in a position less than tc from the ship's side or less than 
vc from the ship's bottom shall be fitted with valves or 
similar closing devices at the point at which they open into 
any cargo tank. These valves shall be kept closed at sea at 
any time when the tanks contain cargo oil, except that they 
may be opened only for cargo transfer needed for the purpose 
of trimming of the ship.


Regulation 25

SUBDIVISION AND STABILITY

1. Every new oil tanker shall comply with the subdivision and 
damage stability criteria as specified in paragraph (3) of 
this Regulation, after the assumed side or bottom damage as 
specified in paragraph (2) of this Regualtion, for any 
operating draught reflecting actual partial or full load 
conditions consistent with trim and strength of the ship as 
well as specific gravities of the cargo. Such damage shall be 
applied to all conceivable locations along the length of the 
ship as follows:

a) in tankers of more than 225 metres in length, anywhere in 
the ship's length;

b) in tankers of more than 150 metres, but not exceeding 225 
metres in length, anywhere in the ship's length except 
involving either after or forward bulkhead bounding the 
machinery space located aft. The machinery space shall be 
treated as a single floodable compartment;

c) in tankers not exceeding 150 metres in length,
anywhere in the ship's length between adjacent transverse 
bulkheads with the exception of the machinery space. For 
tankers of 100 metres or less in length where all 
requirements of paragraph (3) of this Regulation cannot be 
fulfilled without materially impairing the operational 
qualities of the ship, Administrations may allow relaxations 
from these requirements.

Ballast conditions where the tanker is not carrying oil in 
cargo tanks excluding any oil residues, shall not be 
considered.

2. The following provisions regarding the extent and the 
character of the assumed damage shall apply:

a) The extent of side or bottom damage shall be as specified 
in Regulation 22 of this Annex, except that the longitudinal 
extent of the bottom damage within 0.3L from the forward 
perpendicular shall be the same as for side damage, as 
specified in Regulation 22 (1)(a)(i) of this Annex. If any 
damage of lesser extent results in a more severe condition 
such damage shall be assumed.

b) Where the damage involving transverse bulkheads is 
envisaged as specified in subparagraphs (1)(a) and (b) of 
this Regulation, transverse watertight bulkheads shall be 
spaced at least at a distance equal to the longitudinal 
extent of assumed damage specified in sub-paragraph (a) of 
this paragraph in order to be considered effective. Where 
transverse bulkheads are spaced at a lesser distance, one or 
more of these bulkheads within such extent of damage shall be 
assumed as non-existent for the purpose of determining 
flooded compartments.

c) Where the damage between adjacent transverse watertight 
bulkheads is envisaged as specified in sub-paragraph (1)(c) 
of this Regulation, no main transverse bulkhead or a 
transverse bulkhead bounding side tanks or double bottom 
tanks shall be assumed damaged, unless:

(i) the spacing of the adjacent bulkheads is less than the 
longitudinal extent of assumed damage specified in sub-
paragraph (a) of this paragraph; or
(ii) there is a step or a recess in a transverse bulkhead of 
more than 3.05 metres in length, located within the extent of 
penetration of assumed damage. The step forward by the after 
peak bulkhead and after peak tank top shall not be regarded 
as a step for the purpose of this Regulation.

d) If pipes, ducts or tunnels are situated within the assumed 
extent of damage, arrangements shall be made so that 
progressive flooding cannot thereby extend to compartments 
other than those assumed to be floodable for each case of 
damage.

3. Oil tankers shall be regarded as complying with the damage 
stability criteria if the following requirements are met:

a) The final waterline, taking into account sinkage, heel and 
trim, shall be below the lower edge of any opening through 
which progressive flooding may take place. Such openings 
shall include air pipes and those which are closed by means 
of weathertight doors or hatch covers and may exclude those 
openings closed by means of watertight manhole covers and 
flush scuttles, small watertight cargo tank hatch covers 
which maintain the high integrity of the deck, remotely 
operated watertight sliding doors, and side scuttles of the 
non-opening type,

b) In the final stage of flooding, the angle of heel due to 
unsymmetrical flooding shall not exceed 25 degrees, provided 
that this angle may be increased up to 30 degrees if no deck 
edge immersion occurs.

c) The stability in the final stage of flooding shall be 
investigated and may be regarded as sufficient if the 
righting lever curve has at least a range of 20 degrees 
beyond the position of equilibrium in association with a 
maximum residual righting lever of at least 0.1 metre. The 
Administration shall give consideration to the potential 
hazard presented by protected or unprotected openings which 
may become temporarily immersed within the range of residual 
stability.

d) The Administration shall be satisfied that the stability 
is sufficient during intermediate stages of flooding.

4. The requirements of paragraph (1) of this Regulation shall 
be confirmed by calculations which take into consideration 
the design characteristics of the ship, the arrangements, 
configuration and contents of the damaged compartments; and 
the distribution, specific gravities and the free surface 
effect of liquids. The calculations shall be based on the 
following:

a) Account shall be taken of any empty or partially filled 
tank, the specific gravity of cargoes carried, as well as any 
outflow of liquids from damaged compartments.

b) The permeabilities are assumed as follows:

Spaces	              Permeability

Appropriated to	     0.60
 stores

Occupied by	          0.95
 accommodation

Occupied by machinery   0.85

Voids	               0.95

Intended for	          0 to 0.95*
 consumable liquids

Intended for	          0 to 0.95**
 other liquids

* Whichever results in the more severe requirements.

** The permeability of partially filled compartments shall be 
consistent with the amount of liquid carried.

c) The buoyancy of any superstructure directly above the side 
damage shall be disregarded. The unflooded parts of 
superstructures beyond the extent of damage, however, may be 
taken into consideration provided that they are separated 
from the damaged space by watertight bulkheads and the 
requirements of sub-paragraph (3)(a) of this Regulation in 
respect of these intact spaces are complied with. Hinged 
watertight doors may be acceptable in watertight bulkheads in 
the superstructure.

d) The free surface effect shall be calculated at an angle of 
heel of 5 degrees for each individual compartment. The 
Administration may require or allow the free surface 
corrections to be calculated at an angle of heel greater than 
5 degrees for partially filled tanks.

e) In calculating the effect of free surfaces of consumable 
liquids it shall be assumed that, for each type of liquid at 
least one transverse pair or a single centreline tank has a 
free surface and the tank or combination of tanks to be taken 
into account shall be those where the effect of free surfaces 
is the greatest.

5. The Master of every oil tanker and the person in charge of 
a non-self-propelled oil tanker to which this Annex applies 
shall be supplied in an approved form with:

a) information relative to loading and distribution of cargo 
necessary to ensure compliance with the provisions of this 
Regulation; and

b) data on the ability of the ship to comply with damage 
stability criteria as determined by this Regulation, 
including the effect of relaxations that may have been 
allowed under sub-paragraph (1)(c) of this Regulation.


                     APPENDIX I

                       LIST OF OILS*

* The list of oils shall not necessarily be considered as 
comprehensive.

Asphalt solutions
Blending Stocks
Roofers Flux
Straight Run Residue

Oils
Clarified
Crude Oil
Mixtures containing crude oil
Diesel Oil
Fuel Oil No. 4
Fuel Oil No. 5
Fuel Oil No. 6
Road Oil
Transformer Oil
Aromatic Oil (excluding vegetable oil)
Lubricating Oils and Blending Stocks
Mineral Oil
Motor Oil
Penetrating Oil
Spindle Oil
Turbine Oil

Distillates
Straight Run
Flashed Feed Stocks

Gas Oil
Cracked

Gasoline Blending Stocks
Aklylates Ñ fuel
Reformates
Polymer Ñ fuel

Gasolines
Casinghead (natural)
Automotive
Aviation
Straight Run
Fuel Oil No. 1 (Kerosene)
Fuel Oil No. 1-D
Fuel Oil No. 2
Fuel Oil No. 2-D

Jet Fuels
JP-1 (Kerosene)
JP-3
JP-4
JP-5 (Kerosene, Heavy)
Turbo Fuel
Kerosene
Mineral Spirit

Naphtha
Solvent
Petroleum
Heartcut Distillate Oil


APPENDIX II

Form of Certificate


INTERNATIONAL OIL PREVENTION CERTIFICATE (1973)

Issued under the Provisions of the International Convention 
for the Prevention of Pollution from Ships, 1973, under the 
Authority of the Government of

...................................................
(full designation of the country)

by ............................................... (full 
designation of the competent person or organization 
authorized under the provisions of the International 
Convention for the Prevention of Pollution from Ships, 1973)

Name of Ship	 Number or
Distinctive    
Letter	Port of
Registry	Gross Tonnage
			
             
Type of ship:

Oil tanker, including combination carrier*

* Delete as appropriate

Asphalt carrier*

Ship other than oil tanker with cargo tanks coming under 
Regulation 2(2) of Annex I of the Convention* Ship other than 
any of the above*

New/existing ship*

Date of building or major conversion contract..............
                         
.........................................................

Date on which keel was laid or ship was at a similar stage of 
construction or on which major conversion was 
commenced....................................................
..................

Date of delivery or completion of major conversion........                   
......................................................


PART A

ALL SHIPS 

The ship is equipped with: 

for ships of 400 tons gross tonnage and above:

a) oily-water separating equipment* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million) or

* Delete as appropriate

b) an oil filtering system* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million)

for ships of 10,000 tons gross tonnage and above: 

c) an oil discharge monitoring and control system* 
(additional to (a) or(b) above) or

d) oil-water separating equipment and an oil filtering 
system* (capable of producing the effluent with an oil 
content not exceeding 15 pars per million) in lieu of (a) or 
(b) above.

Particulars of requirement from which exemption is granted 
under Regulation 2(2) and 2(4)(a) of Annex I of the 
Convention:

...................................................
...................................................

Remarks:



PART B

OIL TANKER

Deadweight ..................metric tons. Length of 
ship...............	metres.

It is certified that this ship is:

a) required to be constructed according to and complies with

b) not required to be constructed according to

c) nor required to be constructed according to, but complies 
with the requirements of Regulation 24 of Annex I of the 
Convention.

The capacity of segregated ballast tanks 
is...................................cubic metres and
complies with the requirements of Regulation 24 of Annex I of 
the Convention 

The segregated ballast is distributed as follows:

Tank 	Quantity	Tank	Quantity
			

    			
This Part should be completed for oil tankers including 
combination carriers and asphalt carriers, and those entries 
which are applicable should be completed for ships other than 
oil tankers which are constructed and utilized to carry oil 
in bulk of an aggregate capacity of 200 cubic metres or 
above.

2 This page need not be reproduced on a Certificate issued to 
any ship other than those referred to in footnote.1

3 Delete as appropriate


THIS IS TO CERTIFY:

That the ship has been surveyed in accordance with Regulation 
4 of Annex I of the International Covention for the 
Prevention of Pollution from Ships, 1973, concerning the 
prevention of pollution of oil; and

That the survey shows that the structure, equipment, 
fittings, arrangements and material of the ship and the 
condition thereof are in all respects, satisfactory and that 
the ship complies with the applicable requirements of Annex I 
of the Convention.

This Certificate is valid until............................

subject to intermediate survey(s) at intervals of .........

Issued at.................................................

                   (place of issue of Certificate)

........................19....   ............................
(Signature of duly                 
authorized official issuing 
the Certificate)

  (Seal or stamp of the issuing Authority, as appropriate)

Endorsement for existing ships4

4 This entry need not be reproduced on a Certificate other 
than the first Certificate issued to any ship.

This is to certify that this ship has been so equipped as to 
comply with the requirements of the International Convention 
for the Prevention of Pollution from Ships, 1973 as relating 
to existing ships three years from the date of entry into 
force of the Convention.

signed ....................
                                    
signed......................
(Signature of duly authorized         
official)

Place of endorsement 
................................

Date of endorsement 
...............................

      (Seal or stamp of the Authority, as appropriate)


                 Intermediate survey

This is to certify that at an intermediate survey required by 
Regulation 4(1)(c) of Annex I of the Convention, this ship 
and the condition thereof are found to comply with the 
relevant provisions of the Convention.

Signed .....................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)


 Signed.....................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)

Under the provisions of Regulation 8(2) and (4) of Annex I of 
the Convention the validity of this Certificate is extended 
until
.................................................

                             
Signed......................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)



APPENDIX III

FORM OF OIL RECORD BOOK

OIL RECORD BOOK

I Ñ FOR OIL TANKERS1

1 This Part should be completed for oil tankers including 
combination carriers and asphalt carriers, and those entries 
which are applicable shall be completed for ships other than 
oil tankers which are constructed and utilized to carry oil 
in bulk of an aggregate capacity of 200 cubic metres or 
above. This Part need not be reproduced on an Oil Record Book 
issued to any ship other than those referred to above.

Name of ship ......................... 

Total cargo carrying capacity of ship in cubic metres 
......................................................Voyage 
..........(date).....to .............	(date)
 
a) Loading of oil cargo
1. Date and
place of
loading			
2. Types of
oil loaded			
3. Identity
of tank(s)
loaded			
4. Closing
of applic-
able cargo
tank valves
and applic-
able line
cut-off
valves on
completion
of loading2			

2 Applicable valves and similar devices are those referred to 
in Regulations 20(2)(a)(iii), 23 and 24 of Annex I of the 
Convention.

The undersigned certifies that in addition to the above, all 
sea valves, overboard discharges valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of loading oil cargo.

Date of entry..........    Officer in charge..............

                           Master ........................

b) Internal transfer of oil cargo during voyage

5. Date of
internal transfer		
6. Identity of
tank(s)	
 (i) From	
	(ii) To	
7. Was(were)
tank(s) in 6(i)
emptied?		

The undersigned certifies that in addition to the above, all 
sea valves overboard discharge valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of internal transfer of oil cargo.

Date of entry............. Officer in charge...........
                        Master..................

c) Unloading of oil cargo

8. Date and place of unloading

9. Identity of tank(s) unloaded

10. Was(were) tank(s) emptied?  

11. Opening of applicable cargo tank valves and applicable 
line cut-off valves on completion of unloading2

12. Closing of applicable cargo tank valves and applicable 
line cut off valves on completion of unloading2

2 Applicable valves and similar devices are those referred to 
in Regulation 20(2)(a)(iii), 23 and 24 of Annex I of the 
Convention.

The tank certifies that in addition to the above, all sea 
valves, overboard discharge valves, cargo tank and pipeline 
connections and inter-connections, were secured on completion 
of unlo
INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

c) The oil residues which cannot be discharged into the sea 
in compliance with sub-paragraph (a) of this paragraph shall 
be retained on board or discharged to reception facilities.

4. The provisions of this Regulation shall not apply to the 
discharge of clean or segregated ballast.

5. Nothing in this Regulation shall prohibit a ship on a 
voyage only part of which is in a special area from 
discharging outside the special area in accordance with 
Regulation 9 of this Annex.

6. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, the Governments of Parties to the Convention 
should, to the extent they are reasonably able to do so, 
promptly investigate the facts bearing on the issue of 
whether there has been a violation of the provisions of this 
Regulation or Regulation 9 of this Annex. The investigation 
should include, in particular, the wind and sea conditions, 
the track and speed of the ship, other possible sources of 
the visible traces in the vicinity,and any relevant oil 
discharge records. 

7. Reception facilities within special areas:

a) Mediterranean Sea, Black Sea and Baltic Sea areas:

(i) The Government of each Party to the Convention, the 
coastline of which borders on any given special area 
undertakes to ensure that not later than 1 January 1977 all 
oil loading terminals and repair ports within the special 
area are provided with facilities adequate for the reception 
and treatment of all the dirty ballast and tank washing water 
from oil tankers. In addition all ports within the special 
area shall be provided with adequate reception facilities for 
other residues and oily mixtures from all ships. Such 
facilities shall have adequate capacity to meet the needs of 
the ships using them without causing undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast undertakes to ensure the provision of 
the facilities referred to in sub-paragraph (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) During the period between the entry into force of the 
present Convention (if earlier than 1 January 1977) and, 1 
January 1977 ships while navigating in the special areas 
shall comply with the requirements of Regulation 9 of this 
Annex. However, the Governments of Parties the coastlines of 
which border any of the special areas under this sub-
paragraph may establish a date earlier than 1 January 1977, 
but after the date of entry into force of the present 
Convention, from which the requirements of this Regulation in 
respect of the special areas in question shall take effect:

(1) if all the reception facilities required have been 
provided by the date so established, and

(2) provided that the Parties concerned notify the
Organization of the date so established at least six months 
in advance, for circulation to other Parties.

(iv) After 1 January 1977, or the date established in 
accordance with sub-paragraph (a)(iii) of this paragraph if 
earlier, each Party shall notify the Organization for 
transmission to the Contracting Governments concerned of all 
cases where the facilities are alleged to be inadequate.

b) Red Sea area and Gulfs area:
(i) The Government of each Party the coastline of which 
borders on the special areas undertakes to ensure that as 
soon as possible all oil loading terminals and repair ports 
within these special areas are provided with facilities 
adequate for the reception and treatment of all the dirty 
ballast and tank washing water from tankers. In addition all 
ports within the special area shall be provided with adequate 
reception facilities for other residues and oily mixtures 
from all ships. Such facilities shall have adequate capacity 
to meet the needs of the ships using them without causing 
undue delay.

(ii) The Government of each Party having under its 
jurisdiction entrances to seawater courses with low depth 
contour which might require a reduction of draught by the 
discharge of ballast in sub-paragraphs (a)(i) of this 
paragraph but with the proviso that ships required to 
discharge slops or dirty ballast could be subject to some 
delay.

(iii) Each Party concerned shall notify the Organization of 
the measures taken pursuant to provisions of sub-paragraph 
(b)(i) and (ii) of this paragraph. Upon receipt of sufficient 
notifications the Organization shall establish a date from 
which the requirements of this Regulation in respect of the 
area in question shall take effect. The Organization shall 
notify all Parties of the date so established no less than 
twelve months in advance of that date.

(iv) During the period between the entry into force of the 
present Convention and the date so established, ships while 
navigating in the special area shall comply with the 
requirements of Regulation 9 of this Annex.

(v) After such date oil tankers loading in ports in these 
special areas where such facilities are not yet available 
shall also fully comply with the requirements of this 
Regulation. However, oil tankers entering these special areas 
for the purpose of loading shall make every effort to enter 
the area with only clean ballast on board.

(vi) After the date on which the requirements for the special 
area in question take effect, each Party shall notify the 
Organization for transmission to the Parties concerned of all 
cases where the facilities are alleged to be inadequate.

(vii) At least the reception facilities as prescribed in 
Regulation 12 of this Annex shall be provided by 1 January 
1977 or one year after the date of entry into force of the 
present Convention whichever occurs later.


Regulation 11 

EXCEPTIONS

Regulations 9 and 10 of this Annex shall not apply to:

a) the discharge into the sea of oil or oily mixture 
necessary for the purpose of securing the safety of a ship or 
saving life at sea; or

b) the discharge into the sea of oil or oily mixture 
resulting from damage to a ship or its equipment:

 (i) provided that all reasonable precautions have been taken 
after the occurrence of the damage or discovery of the 
discharge for the purpose of preventing or minimizing the 
discharge; and

 (ii) except if the owner or the Master acted either with 
intent to cause damage, or recklessly and with knowledge that 
damage would probably result; or

c) the discharge into the sea of substances containing oil, 
approved by the Administration, when being used for the 
purpose of combating specific pollution incidents in order to 
minimize the damage from pollution. Any such discharge shall 
be subject to the approval of any Government in whose 
jurisdiction it is contemplated the discharge will occur.


Regulation 12 

RECEPTION FACILITIES 

1. Subject to the provisions of Regulation 10 of this Annex, 
the Government of each Party undertakes to ensure the 
provision at oil loading terminals, repair ports, and in 
other ports in which ships have oily residues to discharge, 
of facilities for the reception of such residues and oily 
mixtures as remain from oil tankers and other ships adequate 
to meet the needs of the ships using them without causing 
undue delay to ships. 

2. Reception facilities in accordance with paragraph (1) of 
this Regulation shall be provided in:

a) all ports and terminals in which crude oil is loaded into 
oil tankers where such tankers have immediately prior to 
arrival completed a ballast voyage of not more than 72 hours 
or not more than 1,200 nautical miles;

b) all ports and terminals in which oil other than crude oil 
in bulk is loaded at an average quantity of more than 1,000 
metric tons per day;

c) all ports having ship repair yards or tank cleaning 
facilities;

d) all ports and terminals which handle ships provided with 
the sludge tank(s) required by Regulation 17 of this Annex:

e) all ports in respect of oily bilge waters and other 
residues, which cannot be discharged in accordance with 
Regulation 9 of this Annex; and

f) all loading ports for bulk cargoes in respect of oil 
residues from combination carriers which cannot be discharged 
in accordance with Regulation 9 of this Annex.

3. The capacity for the reception facilities shall be as 
follows:

a) Crude oil loading terminals shall have sufficient 
reception facilities to receive oil and oily mixtures which 
cannot be discharged in accordance with the provisions of 
Regulation 9(1)(a) of this Annex from all oil tankers on 
voyages as described in paragraph (2) (a) of this Regulation.

b) Loading ports and terminals referred to in paragraph 
(2)(b) of this Regulation shall have sufficient reception 
facilities to receive oil and oily mixtures which cannot be 
discharged in accordacne with the provisions of Regulation 
9(1) (a) of this Annex from oil tankers which load oil other 
than crude oil in bulk.

c) All ports having ship repair yards or tank cleaning 
facilities shall have sufficient reception facilities to 
receive all residues and oily mixtures which remain on board 
for disposal from ships prior to entering such yards or 
facilities. 

d) All facilities provided in ports and terminals under 
paragraph (2)(d) of this Regulation shall be sufficient to 
receive all residues retained according to Regulation 17 of 
this Annex from all ships that may reasonably be expected to 
call at such ports and terminals.

e) All facilities provided in ports and terminals under this 
Regulation shall be sufficient to receive oily bilge waters 
and other residues which cannot be discharged in accordance 
with Regulation 9 of this Annex.

f) The facilities provided in loading ports for bulk cargoes 
shall take into account the special problems of combination 
carriers as appropriate.

4. The reception facilities prescribed in paragraphs (2) and 
(3) of this Regulation shall be made available no later than 
one year from the date of entry into force of the present 
Convention or by 1 January 1977, whichever occurs later.

5. Each Party shall notify the Organization for transmission 
to the Parties concerned of all cases where the facilities 
provided under this Regulation are alleged to be inadequate.


Regulation 13

SEGREGATED BALLAST OIL TANKERS

1. Every new oil tanker of 70,000 tons deadweight and above 
shall be provided with segregated ballast tanks and shall 
comply with the requirements of this Regulation.

2. The capacity of the segregated ballast tanks shall be so 
determined that the ship may operate safely on ballast 
voyages without recourse to the use of oil tanks for water 
ballast except as provided for in paragraph (3) of this 
Regulation. In all cases, however, the capacity of segregated 
ballast tanks shall be at least such that in any ballast 
condition at any part of the voyage, including the conditions 
consisting of lightweight plus segregated ballast only, the 
ship's draughts and trim can meet each of the following 
requirements:

a) the moulded draught amidships (dm) in metres (without 
taking into account any ship's deformation) shall not be les 
than:

   dm = 2.0 + 0.02L;

b) the draughts at the forward and after perpendiculars shall 
correspond to those determined by the draught amidships (dm), 
as specified in sub-paragraph (a) of this paragraph, in 
association with the trim by the stern of not greater than 
0.015L; and

c) in any case the draught at the after perpendicular shall 
not be less than that which is necessary to obtain full 
immersion of the propeller(s).

3. In no case shall ballast water be carried in oil tanks 
except in weather conditions so severe that, in the opinion 
of the Master, it is necessary to carry additional ballast 
water in oil tanks for the safety of the ship. Such 
additional ballast water shall be processed and discharged in 
compliance with Regulation 9 and in accordance with the 
requirements of Regulation 15 of this Annex, and entry shall 
be made in the Oil Record Book referred to in Regulation 20 
of this Annex.

4. Any oil tanker which is not required to be provided with 
segregated ballast tanks in accordance with paragraph (1) of 
this Regulation may, however, be qualified as a segregated 
ballast tanker, provided that in the case of an oil tanker of 
150 metres in length and above it fully complies with the 
requirements of paragraphs (2) and (3) of this Regulation and 
in the case of an oil tanker of less than 150 metres in 
length the segregated ballast conditions shall be to the 
satisfaction of the Administration.


Regulation 14 

SEGREGATION OF OIL AND WATER BALLAST

1. Except as provided in paragraph (2) of this Regulation, in 
new ships of 4,000 tons gross tonnage and above other than 
oil tankers, and in new oil tankers of 150 tons gross tonnage 
and above, no ballast water shall be carried in any oil fuel 
tank.

2. Where abnormal conditions or the need to carry large 
quantities of oil fuel render it necessary to carry ballast 
water which is not a clean ballast in any oil fuel tank, such 
ballast water shall be discharged to reception facilities or 
into the sea in compliance with Regulation 9 using the 
equipment specified in Regulation 16 (2) of this Annex, and 
an entry shall be made in the Oil Record Book to this effect.

3. All other ships shall comply with the requirements of 
paragraph (1) of this Regulation as far as reasonable and 
practicable.


Regulation 15

RETENTION OF OIL ON BOARD

1. Subject to the provisions of paragraphs (5) and (6) of 
this Regulation, oil tankers of 150 tons gross tonnage and 
above shall be provided with arrangements in accordance with 
the requirements of paragraphs (2) and (3) of this 
Regulation, provided that in the case of existing tankers the 
requirements for oil discharge monitoring and control systems 
and slop tank arrangements shall apply three years after the 
date of entry into force of the present Convention.

2. a) Adequate means shall be provided for cleaning the cargo 
tanks and transferring the dirty ballast residue and tank 
washings from the cargo tanks into a slop tank approved by 
the Administration. In existing oil tankers, any cargo tank 
may be designated as a slop tank.

b) In this system arrangements shall be provided to transfer 
the oily waste into a slop tank or combination of slop tanks 
in such a way that any effluent discharged into the sea will 
be such as to comply with the provisions of Regulation 9 of 
this Annex.

c) The arrangements of the slop tank or combination of slop 
tanks shall have a capacity necessary to retain the slops 
generated by tank washing, oil residues and dirty ballast 
residues but the total shall be not less than 3 per cent of 
the oil carrying capacity of the ship, except that, where 
segregated ballast tanks are provided in accordance with 
Regulation 13 of this Annex, or where arrangements such as 
eductors involving the use of water additional to the washing 
water are not fitted, the Administration may accept 2 per 
cent. New oil tankers over 70,000 tons deadweight shall be 
provided with at least two slop tanks.

d) Slop tanks shall be designed particularly in respect of 
the position of inlets, outlets, baffles or where fitted, so 
as to avoid excessive turbulence and entrainment of oil or 
emulsion with the water.

3. a) An oil discharge monitoring and control system approved 
by the Administration shall be fitted. In considering the 
design of the oil content meter to be incorported in the 
system, the Administration shall have regard to the 
specification recommended by the Organization.*

* Reference is made to "Clean Seas Guide for Oil Tankers", 
published by the International Chamber of Shipping and the 
Oil Companies International Marine Forum.

The system shall be fitted with a recording device to provide 
a continuous record of the discharge in litres per nautical 
mile and total quantity discharged, or the oil content and 
rate of discharge. This record shall be identifiable as to 
time and date and shall be kept for at least three years. The 
oil discharge monitor and control system shall come into 
operation when there is any discharge of effluent into the 
sea and shall be such as will ensure that any discharge of 
oily mixture is automatically stopped when the instantaneous 
rate of discharge of oil exceeds that permitted by Regulation 
9(1)(a) of this Annex. Any failure of this monitoring and 
control system shall stop the discharge and be noted in the 
Oil Record Book. A manually operated alternative method shall 
be provided and may be used in the event of such failure, but 
the defective unit shall be made operable before the oil 
tanker commences its next ballast voyage unless it is 
proceeding to a repair port. Existing oil tankers shall 
comply with all of the provisions specified above except that 
the stopping of the discharge may be performed manually and 
the rate of discharge may be estimated from the pump 
characteristic.

b) Effective oil/water interface detectors approved by the 
Administration shall be provided for a rapid and accurate 
determination of the oil/water interface in slop tanks and 
shall be available for use in other tanks where the 
separation of oil and water is effected and from which it is 
intended to discharge effluent direct to the sea.

c) Instructions as to the operation of system shall be in 
accordance with an operational manual approved by the 
Administration. They shall cover manual as well as automatic 
operations and shall be intended to ensure that at no time 
shall oil be discharged except in compliance with the 
conditions specified in Regulation 9 of this Annex.*

* Reference is made to the Recommendation on International 
Performance Specifications for Oily-Water Separating 
Equipment and Oil Content Meters adopted by the Organization 
by Resolution A.233 (VII).

4. The requirements of paragraphs (1), (2) and (3 ) of this 
Regulation shall not apply to oil tankers of less than 150 
tons gross tonnage, for which the control of discharge of oil 
under Regulation 9 of this Annex shall be effected by the 
retention of oil on board with subsequent discharge of all 
contaminated washings to reception facilities. The total 
quantity of oil and water used for washing and returned to a 
storage tank shall be recorded in the Oil Record Book. This 
total quantity shall be discharged to reception facilities 
unless adequate arrangements are made to ensure that any 
effluent which is allowed to be discharged into the sea is 
effectively monitored to ensure that the provision of 
Regulation 9 of this Annex are complied with.

5. The Administration may waive the requirements of 
paragraphs (1), (2) and (3) of this Regulation for any oil 
tanker which engages exclusively on voyages both of 72 hours 
or less in duration and within 50 miles from the nearest 
land, provided that the oil tanker is not required to hold 
and does not hold an International Oil Pollution Prevention 
Certificate (1973). Any such waiver shall be subject to the 
requirements that the oil tanker shall retain on board all 
oily mixtures for subsequent discharge to reception 
facilities and to the determination by the Administration 
that facilities available to receive such oily mixtures are 
adequate.

6. Where in the view of the Organization equipment required 
by Regulation 9(1)(a)(vi) of this Annex and specified in sub-
paragraph (3)(a) of this Regulation is not obtainable for the 
monitoring of discharge of light refined products (white 
oils), the Administration may waive compliance with such 
procedures established by the Organization which shall 
satisfy the conditions of Regulation 9(1)(a) of this Annex 
except the obligation to have an oil discharge monitoring and 
control system in operation. The Organization shall review 
the availability of equipment at intervals not exceeding 
twelve months.

7. The requirements of paragraphs (1), (2) and (3) of this 
Regulation shall not apply to oil tankers carrying asphalt, 
for which the control of discharge of asphalt under 
Regulation 9 of this Annex shall be effected by the retention 
of asphalt residues on board with discharge of all 
contaminated washings to reception facilities.


Regulation 16

OIL DISCHARGE MONITORING AND CONTROL SYSTEM AND OILY-WATER 
SEPARATING EQUIPMENT

1. Any ship of 400 tons gross tonnage and above shall be 
fitted with an oily-water separating equipment or filtering 
system complying with the provisions of paragraph (6) of this 
Regulation. Any such ship which carries large quantities of 
oil fuel shall comply with paragraph 2 of this Regulation or 
paragraph (1) of Regulation 14.

2. Any ship of 10,000 tons gross tonnage and above shall be 
fitted:

a) in addition to the requirements of paragraph (1) of this 
Regulation with an oil discharge monitoring and control 
system complying with paragraph (5) of this Regulation; or

b) as an alternative to the requirements of paragraph (1) and 
sub-paragraph (2)(a) of this Regulation, with an oily-water 
separating equipment complying with paragraph (6) of this 
Regulation and an effective filtering system, complying with 
paragraph (7) of this Regulation. 

3. The Administration shall ensure that ships of less 400 
tons gross tonnage are equipped, as far as practicable, to 
retain on board oil or oily mixtures or discharge them in 
accordance with the requirements of Regulation 9(1)(b) of 
this Annex. 

4. For existing ships the requirements of paragraphs (1),(2) 
and (3) of this Regulation shall apply three years after the 
date of entry into force of the present Convention.

5. An oil discharge monitoring and control system shall be of 
a design approved by the Administration. In considering the 
design of the oil content meter to be incorporated into the 
system, the Administration shall have regard to the 
specification recommended by the Organization.* The system 
shall be fitted with a recording device to provide a 
continuous record of the oil content in parts per million. 
This record shall be identifiable as to time and date and 
shall be kept for at least three years. The monitoring and 
control system shall come into operation when there is any 
discharge of effluent into the sea and shall be such as will 
ensure that any discharge of oily mixture is automatically 
stopped when the oil content of effluent exceeds that 
permitted by Regulation 9(1)(b) of this Annex. Any failure of 
this monitoring and control system shall stop the discharge 
and be noted in the Oil Record Book. The defective unit shall 
be made operable before the ship commences its next voyage 
unless it is proceeding to a repair port. Existing ships 
shall comply with all of the provisions specified above 
except that the stopping of the discharge may be performed 
manually.

6. Only-water separating equipment or an oil filtering system 
shall be of a design approved by the Administration and shall 
be such as will ensure that any oily mixture discharged into 
the sea after passing through the separator or filtering 
systems shall have an oil content of not more than 100 parts 
per million. In considering the design of such equipment, the 
Administration shall have regard to the specification 
recommended by the Organization.*

7. The oil filtering system referred to in paragraph (2)(b) 
of this Regulation shall be of a design approved by the 
Administration and shall be such that it will accept the 
discharge from the separating system and produce an effluent 
the oil content of which does not exceed 15 parts per 
million. It shall be provided with alarm arrangements to 
indicate when this level cannot be maintained.


Regulation 17

TANKS FOR OIL RESIDUES (SLUDGE)

1. Every ship of 400 tons gross tonnage and above shall be 
provided with a tank or tanks of adequate capacity, having 
regard to the type of machinery and length of voyage, to 
receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this 
Annex, such as those resulting from the purification of fuel 
and lubricating oils and oil leakages in the machinery 
spaces.

2. In new ships, such tanks shall be designed and constructed 
so as to facilitate their cleaning and the discharge of 
residues to reception facilities. Existing ships shall comply 
with this requirement as far as is reasonable and 
practicable.


Regulation 18

PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS

1. In every oil tanker, a discharge manifold for connexion to 
reception facilities for the discharge of dirty ballast water 
or oil contaminated water shall be located on the open deck 
on both sides of the ship.

2. In every oil tanker, pipelines for the discharge to the 
sea of effluent which may be permitted under Regulation 9 of 
this Annex shall be led to the open deck or to the ship's 
side above the waterline in the deepest ballast condition. 
Different piping arrangements to permit operation in the 
manner permitted in sub-paragraphs (4)(a) and (b) of this 
Regulation may be accepted.

3. In new oil tankers means shall be provided for stopping 
the discharge of effluent into the sea from a position on 
upper deck or above located so that the manifold in use 
referred to in paragraph (1) of this Regulation and the 
effluent from the pipelines referred to in paragraph (2) of 
this Regulation may be visually observed. Means for stopping 
the discharge need not be provided at the observation 
position if a positive communication system such as telephone 
or radio system is provided between the observation position 
and the discharge control position.

4. All discharges shall take place above the waterline except 
as follows:

a) Segregated ballast and clean ballast may be discharged 
below the waterline in ports or at offshore terminals.

b) Existing ships which, without modification, are not 
capable of discharging segregated ballast above the waterline 
may discharge segregated ballast below the waterline provided 
that an examination of the tank immediately before the 
discharge has established that no contamination with oil has 
taken place.


Regulation 19

STANDARD DISCHARGE CONNECTION

To enable pipes of reception facilities to be connected with 
the ship's discharge pipeline for residues from machinery 
bilges, both lines shall be fitted with a standard discharge 
connection in accordance with the following table:

Standard Dimensions of Flanges for Discharge 
Connections


    Description            Dimension

Outside diameter           215 mm
         
Inner diameter             According to pipe                                                   
outside diameter

Bolt circle diameter       183 mm

Slots in flange            6 holes 22 mm in            
diameter equidistantly placed 
on a bolt circle of the above 
diameter, slotted to the 
flange periphery. The slot 
width to be 22 mm

Flange thickness           20 mm

Bolts and nuts:            6, each of 20 mm in 
quantity, diameter         diameter and of suitable length

The flange is designed to accept pipes up to a maximum 
internal diameter of 125 mm and shall be of steel or other 
equivalent material having a flat face. This flange, together 
with a gasket of oilproof material, shall be suitable for a 
service pressure of 6 kg/cm1.


Regulation 20

OIL RECORD BOOK

1. Every oil tanker of 150 tons gross tonnage and above and 
every ship of 400 tons gross tonnage and above other than oil 
tanker shall be provided with an Oil Record Book, whether as 
part of the ship's official log book or otherwise, in the 
form specified in Appendix III to this Annex.

2. The Oil Record Book shall be completed on each occasion, 
on a tank-to-tank basis, whenever any of the following 
operations take place in the ship:

a) For oil tankers

  (i) loading of oil cargo;

 (ii) internal transfer of oil cargo during voyage;

(iii) opening or closing before and after loading and 
unloading operations of valves or similar devices which 
inter-connect cargo tanks;

(iv) opening or closing of means of communication between 
cargo piping and seawater ballast piping;

 (v) opening or closing of ship's side valves before, during 
and after loading and unloading operations;
(vi) unloading of oil cargo;

(vii) ballasting of cargo tanks;

(viii) cleaning of cargo tanks;

(ix) discharge of ballast except from segregated ballast 
tanks;

(x) discharge of water from slop tanks;

(xi) disposal of residues;

(xii) discharge overboard of bilge water which has 
accumulated in machinery spaces whilst in port and the 
routine discharge at sea of bilge water which has accumulated 
in machinery spaces.

 b) For ships other than oil tankers

(i) ballasting or cleaning of fuel oil tanks or oil cargo 
spaces;

(ii) discharge of ballast or cleaning water from tanks 
referred to under (i) of this sub-paragraph;

(iii) disposal of residues;

(iv) discharge overboard of bilge water which has accumulated 
in machinery spaces whilst in port, and the routine discharge 
at sea of bilge water which has accumulated in machinery 
spaces.

3. In the event of such discharge of oil or oily mixture as 
is referred to in Regulation 11 of this
Annex or in the event of accidental or other exceptional 
discharge of oil not expected by that Regulation, a statement 
shall be made in the Oil Record Book of the circumstances of, 
and the reasons for the discharge.

4. Each operation described in paragraph (2) of this 
Regulation shall be fully recorded without delay in the Oil 
Record Book so that all the entries in the book appropriate 
to that operation are completed. Each section of the book 
shall be signed by the officer or officers in charge of the 
operations concerned and shall be countersigned by the Master 
of the ship. The entries in the Oil Record Book shall be in 
an official language of the State whose flag the ship is 
entitled to fly, and, for ships holding an International Oil 
Pollution Prevention Certificate (1973), in English or 
French. The entries in an official national language of the 
State whose flag the ship is entitled to fly shall prevail in 
case of a dispute or discrepancy.

5. The Oil Record Book shall be kept in such a place as to be 
readily available for inspection at all reasonable times and, 
except in the case of unmanned ships under tow, shall be kept 
on board the ship. It shall be preserved for a period of 
three years after the last entry has been made.

6. The competent authority of the Government of a party to 
the Convention may inspect the Oil Record Book on board any 
ship to which this Annex applies while the ship is in its 
port or offshore terminals and may take a copy of any entry 
in that book and may require the Master of the ship to 
certify that the copy is a true copy of such entry. Any copy 
so made which has been certified by the Master of the ship as 
a true copy of an entry in the ship's Oil Record Book shall 
be made admissible in any judicial proceedings as evidence of 
the facts stated in the entry. The inspection of an Oil 
Record Book and the taking of a certified copy of the 
competent authority under this paragraph shall be performed 
as expeditiously as possible without causing the ship to be 
unduly delayed.


Regulation 21

SPECIAL REQUIREMENTS FOR DRILLING RIGS AND OTHER PLATFORMS

Fixed and floating drilling rigs when engaged in the 
exploration, exploitation and associated offshore processing 
of sea-bed mineral resources and other platforms shall comply 
with the requirements of this Annex applicable to ships of 
400 tons gross tonnage and above other than oil tankers, 
except that:

a) they shall be equipped as far as practicable with the 
installations required in Regulations 16 and 17 of this 
Annex;

b) they shall keep a record of all operations involving oil 
or oily mixture discharges, in a form approved by the 
Administration; and

c) in any special area and subject to the provisions of 
Regulation 11 of this Annex, the discharge into the sea of 
oil or oily mixture shall be prohibited except when the oil 
content of the discharge without dilution does not exceed 15 
parts per million.


Chapter III

REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS 
DUE TO SIDE AND BOTTOM DAMAGES


Regulation 22

DAMAGE ASSUMPTIONS

1. For the purpose of calculating hypothetical oil outflow 
from oil tankers, three dimensions of the extent of damage of 
a parallelepiped on the side and bottom of the ship are 
assumed as follows. In the case of bottom damages two 
conditions are set forth to be applied individually to the 
stated portions of the oil tanker.

a) Side damage

(i)  Longitudinal	  1/3 L 2/3 or 14.5 metres,
     extent (lc);	  whichever is less

(ii) Transverse	  B/5 or 11.5 metres,
     extent (lc):   whichever is less

   (inboard from the
   ship's side at right
   angles to the
   centre-line at the
   level correspond-
   ing to the assigned
   summer freeboard)

(iii) Vertical       from the base line
   extent (vc):      upwards without limit

b) Bottom damage
             For 0.3L from     Any other part
             the forward       of the ship
             perpendicular
             of the ship

 (i) Long-    L/10             L/10 or 5 metres,
     itudinal                  whichever is less
     extent (ls)

(ii) Trans-   B/6 or 10 metres, 5 metres
     verse    whichever is less but not less
     extent   than 5 metres
     (ts)	 

(iii) Vertical  B or 6 metres,
     extent
     from the   whichever is less
     base  
     line (vs):

2. Whenever the symbols given in this Regulation
appear in this Chapter, they have the meaning as
defined in this Regulation.


Regulation 23 

HYPOTHETICAL OUTFLOW OF OIL 

1. The hypothetical outflow of oil in the case of side damage 
(Oc) and bottom damage (Os) shall be calculated by the 
following formulae with respect to compartments breached by 
damage to all conceivable locations along the length of the 
ship to the extent as defined in Regulation 22 of this Annex. 

a) for side damages: 

Oc = sigmaW1 + sigmaK1C1         (I)

b) for bottom damages: 

Os = 1/3(sigmaZ1W1 + sigmaZ1C1)     (II)

where:

Wi = volume of a wing tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Wi for a segregated ballast tank may be 
taken equal to zero.

Ci = volume of a centre tank in cubic metres assumed to be 
breached by the damage as specified in Regulation 22 of 
this Annex; Ci for a segregated ballast tank may be 
taken equal to zero.

Ki = 1 - bi/tc  when bi is equal to or greater than           
tc, Ki shall be taken equal to zero,

Zi = 1 - hi/vs when hi is equal to or greater than vs, Zi 
shall be taken equal to zero,

bi= width of wing tank in metres under consideration measured 
inboard from the ship's side at right angles to the 
centreline at the level corresponding to the assigned 
summer freeboard,

hi = minimum depth of the double bottom in metres under 
consideration; where no double bottom is fitted hi shall 
be taken to be equal to zero.

Whenever symbols given in this paragraph appear in the 
Chapter, they have the meaning as defined in this Regulation.

2. If a void space or segregated ballast tank of a length 
less than lc as defined in Regulation 22 of
this Annex is located between wing oil tanks, Oc in formula 
(1) may be calculated on the basis of volume Wi being the 
actual volume of one such tank (where they are of equal 
capacity) or the smaller of the two tanks (if they differ in 
capacity) adjacent to such space, multiplied by Si as defined 
below and taking for all other wing tanks involved in such a 
collision the value of the actual full volume.

Si = 1 - li/lc

where li = length in metres of void space or segregated 
ballast tank under consideration.

3. a) Credit shall only be given in respect of double bottom 
tanks which are either empty or carrying clean water when 
cargo is carried in the tanks above.

b) Where the double bottom does not extent for the full 
length and width of the tank involved, the double bottom is 
considered non-existent and the volume of the tanks above the 
area of the bottom damage shall be included in formula (II) 
even if the tank is not considered breached because of the 
installation of such a partial double bottom.

c) Suction wells may be neglected in the determination of the 
value hi provided such wells are not excessive in area and 
extend below the tank for a minimum distance and in no case 
more than half the height of the double bottom. If the depth 
of such a well exceeds half the height of the double bottom, 
hi shall be taken equal to the double bottom height minus the 
well height.

 Piping serving such wells if installed within the double 
bottom shall be fitted with valves or other closing 
arrangements located at the point of connextion to the tank 
served to prevent oil outflow in the event of damage to the 
piping. Such piping shall be installed as high from the 
bottom shell as possible. These valves shall be kept closed 
at sea at any time when the tank contains oil cargo, except 
that they may be opened only for cargo transfer needed for 
the purpose of trimming of the ship.

4. In the case where bottom damage simultaneously involves 
four centre tanks, the value of Os may be calculated 
according to the formula

Os = 1/4(sigmaZiWi + sigmaZiCi)       (III)

5. An Administration may credit as reducing oil outflow in 
case of bottom damage, an installed cargo transfer system 
having an emergency high suction in each cargo oil tank, 
capable of transferring from a breached tank or tanks to 
segregated ballast tanks or to available cargo tankage if it 
can be assured that such tanks will have sufficient ullage. 
Credit for such a system would be governed by ability to 
transfer in two hours of operation oil equal to one half of 
the largest of the breached tanks involved and by 
availability of equivalent receiving capacity in ballast or 
cargo tanks. The credit shall be confined to permitting 
calculation of Os according to formula (III). The pipes for 
such suctions shall be installed at least at a height not 
less than the vertical extent of the bottom damage vs. The 
Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other Parties to the Convention.


Regulation 24

LIMITATION OF SIZE AND ARRANGEMENT OF CARGO TANKS

1. Every new oil tanker shall comply with the provision of 
this Regulation. Every existing oil tanker shall be required, 
within two years after the date of entry into force of the 
present Convention,
to comply with the provisions of this Regulation if such a 
tanker falls into either of the following categories:

a) a tanker, the delivery of which is after 1 January 1977; 
or

b) a tanker to which both the following conditions apply:

(i) delivery is not later than 1 January 1977; and

(ii) the building contract is placed after 1 January 1974, or 
in cases where no building contract has previously been 
placed, the keel is laid or the tanker is at a similar stage 
of construction after 30 January 1974.

2. Cargo tanks of oil tankers shall be of such size and 
arrangements that the hypothetical outflow Oc or Os 
calculated in accordance with the provisions of Regulation 23 
of this Annex anywhere in the length of the ship does not 
exceed 30,000 cubic metres or 400 x cube root of DW, 
whichever is the greater, but subject to a maximum of 40,000 
cubic metres.

3. The volume of any one wing cargo oil tank of an oil tanker 
shall not exceed seventy-five per cent of the limits of the 
hypothetical oil outflow referred to in paragraph (2) of this 
Regulation. The volume of any one centre cargo oil tank shall 
not exceed 50,000 cubic metres. However, in segregated 
ballast oil tankers as defined in Regulation 13 of this 
Annex, the permitted volume of a wing cargo oil tank situated 
between two segregated ballast tanks, each exceeding lc in 
length, may be increased to the maximum limit of hypothetical 
oil outflow provided that the width of the wing tanks exceeds 
tc.

4. The length of each cargo tank shall not exceed 10 metres 
or one of the following values, whichever is the greater:
a) where no longitudinal bulkhead is provided:
  
   0.1L

b) where a longitudinal bulkhead is provided at the 
centreline only:
  
   0.15L

c) where two or more longitudinal bulkheads are provided:

(i) for wing tanks:
    0.2L 

(ii) for centre tanks:
     (1) if bi Ñ B is equal to or greater than 1/5:

     0.2L B

     (2) if bi/B is less than 1/5:

Ñ where no centreline longitudinal bulkhead is    
provided:
       
    (0.5 bi/B + 0.1)L

Ñwhere a centreline longitudinal bulkhead is provided:
     
(0.25 bi/B + 0.15)L

5. In order not to exceed the volume limits established by 
paragraphs (2), (3) and (4) of this Regulation and 
irrespective of the accepted type of cargo transfer system 
installed, when such a system inter-connects two or more 
cargo tanks, valves or
other similar closing devices shall be provided for 
separating the tanks from each other. These valves or devices 
shall be closed when the tanker is at sea. 

6. Lines of piping which run through cargo tanks
in a position less than tc from the ship's side or less than 
vc from the ship's bottom shall be fitted with valves or 
similar closing devices at the point at which they open into 
any cargo tank. These valves shall be kept closed at sea at 
any time when the tanks contain cargo oil, except that they 
may be opened only for cargo transfer needed for the purpose 
of trimming of the ship.


Regulation 25

SUBDIVISION AND STABILITY

1. Every new oil tanker shall comply with the subdivision and 
damage stability criteria as specified in paragraph (3) of 
this Regulation, after the assumed side or bottom damage as 
specified in paragraph (2) of this Regualtion, for any 
operating draught reflecting actual partial or full load 
conditions consistent with trim and strength of the ship as 
well as specific gravities of the cargo. Such damage shall be 
applied to all conceivable locations along the length of the 
ship as follows:

a) in tankers of more than 225 metres in length, anywhere in 
the ship's length;

b) in tankers of more than 150 metres, but not exceeding 225 
metres in length, anywhere in the ship's length except 
involving either after or forward bulkhead bounding the 
machinery space located aft. The machinery space shall be 
treated as a single floodable compartment;

c) in tankers not exceeding 150 metres in length,
anywhere in the ship's length between adjacent transverse 
bulkheads with the exception of the machinery space. For 
tankers of 100 metres or less in length where all 
requirements of paragraph (3) of this Regulation cannot be 
fulfilled without materially impairing the operational 
qualities of the ship, Administrations may allow relaxations 
from these requirements.

Ballast conditions where the tanker is not carrying oil in 
cargo tanks excluding any oil residues, shall not be 
considered.

2. The following provisions regarding the extent and the 
character of the assumed damage shall apply:

a) The extent of side or bottom damage shall be as specified 
in Regulation 22 of this Annex, except that the longitudinal 
extent of the bottom damage within 0.3L from the forward 
perpendicular shall be the same as for side damage, as 
specified in Regulation 22 (1)(a)(i) of this Annex. If any 
damage of lesser extent results in a more severe condition 
such damage shall be assumed.

b) Where the damage involving transverse bulkheads is 
envisaged as specified in subparagraphs (1)(a) and (b) of 
this Regulation, transverse watertight bulkheads shall be 
spaced at least at a distance equal to the longitudinal 
extent of assumed damage specified in sub-paragraph (a) of 
this paragraph in order to be considered effective. Where 
transverse bulkheads are spaced at a lesser distance, one or 
more of these bulkheads within such extent of damage shall be 
assumed as non-existent for the purpose of determining 
flooded compartments.

c) Where the damage between adjacent transverse watertight 
bulkheads is envisaged as specified in sub-paragraph (1)(c) 
of this Regulation, no main transverse bulkhead or a 
transverse bulkhead bounding side tanks or double bottom 
tanks shall be assumed damaged, unless:

(i) the spacing of the adjacent bulkheads is less than the 
longitudinal extent of assumed damage specified in sub-
paragraph (a) of this paragraph; or
(ii) there is a step or a recess in a transverse bulkhead of 
more than 3.05 metres in length, located within the extent of 
penetration of assumed damage. The step forward by the after 
peak bulkhead and after peak tank top shall not be regarded 
as a step for the purpose of this Regulation.

d) If pipes, ducts or tunnels are situated within the assumed 
extent of damage, arrangements shall be made so that 
progressive flooding cannot thereby extend to compartments 
other than those assumed to be floodable for each case of 
damage.

3. Oil tankers shall be regarded as complying with the damage 
stability criteria if the following requirements are met:

a) The final waterline, taking into account sinkage, heel and 
trim, shall be below the lower edge of any opening through 
which progressive flooding may take place. Such openings 
shall include air pipes and those which are closed by means 
of weathertight doors or hatch covers and may exclude those 
openings closed by means of watertight manhole covers and 
flush scuttles, small watertight cargo tank hatch covers 
which maintain the high integrity of the deck, remotely 
operated watertight sliding doors, and side scuttles of the 
non-opening type,

b) In the final stage of flooding, the angle of heel due to 
unsymmetrical flooding shall not exceed 25 degrees, provided 
that this angle may be increased up to 30 degrees if no deck 
edge immersion occurs.

c) The stability in the final stage of flooding shall be 
investigated and may be regarded as sufficient if the 
righting lever curve has at least a range of 20 degrees 
beyond the position of equilibrium in association with a 
maximum residual righting lever of at least 0.1 metre. The 
Administration shall give consideration to the potential 
hazard presented by protected or unprotected openings which 
may become temporarily immersed within the range of residual 
stability.

d) The Administration shall be satisfied that the stability 
is sufficient during intermediate stages of flooding.

4. The requirements of paragraph (1) of this Regulation shall 
be confirmed by calculations which take into consideration 
the design characteristics of the ship, the arrangements, 
configuration and contents of the damaged compartments; and 
the distribution, specific gravities and the free surface 
effect of liquids. The calculations shall be based on the 
following:

a) Account shall be taken of any empty or partially filled 
tank, the specific gravity of cargoes carried, as well as any 
outflow of liquids from damaged compartments.

b) The permeabilities are assumed as follows:

Spaces	              Permeability

Appropriated to	     0.60
 stores

Occupied by	          0.95
 accommodation

Occupied by machinery   0.85

Voids	               0.95

Intended for	          0 to 0.95*
 consumable liquids

Intended for	          0 to 0.95**
 other liquids

* Whichever results in the more severe requirements.

** The permeability of partially filled compartments shall be 
consistent with the amount of liquid carried.

c) The buoyancy of any superstructure directly above the side 
damage shall be disregarded. The unflooded parts of 
superstructures beyond the extent of damage, however, may be 
taken into consideration provided that they are separated 
from the damaged space by watertight bulkheads and the 
requirements of sub-paragraph (3)(a) of this Regulation in 
respect of these intact spaces are complied with. Hinged 
watertight doors may be acceptable in watertight bulkheads in 
the superstructure.

d) The free surface effect shall be calculated at an angle of 
heel of 5 degrees for each individual compartment. The 
Administration may require or allow the free surface 
corrections to be calculated at an angle of heel greater than 
5 degrees for partially filled tanks.

e) In calculating the effect of free surfaces of consumable 
liquids it shall be assumed that, for each type of liquid at 
least one transverse pair or a single centreline tank has a 
free surface and the tank or combination of tanks to be taken 
into account shall be those where the effect of free surfaces 
is the greatest.

5. The Master of every oil tanker and the person in charge of 
a non-self-propelled oil tanker to which this Annex applies 
shall be supplied in an approved form with:

a) information relative to loading and distribution of cargo 
necessary to ensure compliance with the provisions of this 
Regulation; and

b) data on the ability of the ship to comply with damage 
stability criteria as determined by this Regulation, 
including the effect of relaxations that may have been 
allowed under sub-paragraph (1)(c) of this Regulation.


                     APPENDIX I

                       LIST OF OILS*

* The list of oils shall not necessarily be considered as 
comprehensive.

Asphalt solutions
Blending Stocks
Roofers Flux
Straight Run Residue

Oils
Clarified
Crude Oil
Mixtures containing crude oil
Diesel Oil
Fuel Oil No. 4
Fuel Oil No. 5
Fuel Oil No. 6
Road Oil
Transformer Oil
Aromatic Oil (excluding vegetable oil)
Lubricating Oils and Blending Stocks
Mineral Oil
Motor Oil
Penetrating Oil
Spindle Oil
Turbine Oil

Distillates
Straight Run
Flashed Feed Stocks

Gas Oil
Cracked

Gasoline Blending Stocks
Aklylates Ñ fuel
Reformates
Polymer Ñ fuel

Gasolines
Casinghead (natural)
Automotive
Aviation
Straight Run
Fuel Oil No. 1 (Kerosene)
Fuel Oil No. 1-D
Fuel Oil No. 2
Fuel Oil No. 2-D

Jet Fuels
JP-1 (Kerosene)
JP-3
JP-4
JP-5 (Kerosene, Heavy)
Turbo Fuel
Kerosene
Mineral Spirit

Naphtha
Solvent
Petroleum
Heartcut Distillate Oil


APPENDIX II

Form of Certificate


INTERNATIONAL OIL PREVENTION CERTIFICATE (1973)

Issued under the Provisions of the International Convention 
for the Prevention of Pollution from Ships, 1973, under the 
Authority of the Government of

...................................................
(full designation of the country)

by ............................................... (full 
designation of the competent person or organization 
authorized under the provisions of the International 
Convention for the Prevention of Pollution from Ships, 1973)

Name of Ship	 Number or
Distinctive    
Letter	Port of
Registry	Gross Tonnage
			
             
Type of ship:

Oil tanker, including combination carrier*

* Delete as appropriate

Asphalt carrier*

Ship other than oil tanker with cargo tanks coming under 
Regulation 2(2) of Annex I of the Convention* Ship other than 
any of the above*

New/existing ship*

Date of building or major conversion contract..............
                         
.........................................................

Date on which keel was laid or ship was at a similar stage of 
construction or on which major conversion was 
commenced....................................................
..................

Date of delivery or completion of major conversion........                   
......................................................


PART A

ALL SHIPS 

The ship is equipped with: 

for ships of 400 tons gross tonnage and above:

a) oily-water separating equipment* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million) or

* Delete as appropriate

b) an oil filtering system* (capable of producing the 
effluent with an oil content not exceeding 100 parts per 
million)

for ships of 10,000 tons gross tonnage and above: 

c) an oil discharge monitoring and control system* 
(additional to (a) or(b) above) or

d) oil-water separating equipment and an oil filtering 
system* (capable of producing the effluent with an oil 
content not exceeding 15 pars per million) in lieu of (a) or 
(b) above.

Particulars of requirement from which exemption is granted 
under Regulation 2(2) and 2(4)(a) of Annex I of the 
Convention:

...................................................
...................................................

Remarks:



PART B

OIL TANKER

Deadweight ..................metric tons. Length of 
ship...............	metres.

It is certified that this ship is:

a) required to be constructed according to and complies with

b) not required to be constructed according to

c) nor required to be constructed according to, but complies 
with the requirements of Regulation 24 of Annex I of the 
Convention.

The capacity of segregated ballast tanks 
is...................................cubic metres and
complies with the requirements of Regulation 24 of Annex I of 
the Convention 

The segregated ballast is distributed as follows:

Tank 	Quantity	Tank	Quantity
			

    			
This Part should be completed for oil tankers including 
combination carriers and asphalt carriers, and those entries 
which are applicable should be completed for ships other than 
oil tankers which are constructed and utilized to carry oil 
in bulk of an aggregate capacity of 200 cubic metres or 
above.

2 This page need not be reproduced on a Certificate issued to 
any ship other than those referred to in footnote.1

3 Delete as appropriate


THIS IS TO CERTIFY:

That the ship has been surveyed in accordance with Regulation 
4 of Annex I of the International Covention for the 
Prevention of Pollution from Ships, 1973, concerning the 
prevention of pollution of oil; and

That the survey shows that the structure, equipment, 
fittings, arrangements and material of the ship and the 
condition thereof are in all respects, satisfactory and that 
the ship complies with the applicable requirements of Annex I 
of the Convention.

This Certificate is valid until............................

subject to intermediate survey(s) at intervals of .........

Issued at.................................................

                   (place of issue of Certificate)

........................19....   ............................
(Signature of duly                 
authorized official issuing 
the Certificate)

  (Seal or stamp of the issuing Authority, as appropriate)

Endorsement for existing ships4

4 This entry need not be reproduced on a Certificate other 
than the first Certificate issued to any ship.

This is to certify that this ship has been so equipped as to 
comply with the requirements of the International Convention 
for the Prevention of Pollution from Ships, 1973 as relating 
to existing ships three years from the date of entry into 
force of the Convention.

signed ....................
                                    
signed......................
(Signature of duly authorized         
official)

Place of endorsement 
................................

Date of endorsement 
...............................

      (Seal or stamp of the Authority, as appropriate)


                 Intermediate survey

This is to certify that at an intermediate survey required by 
Regulation 4(1)(c) of Annex I of the Convention, this ship 
and the condition thereof are found to comply with the 
relevant provisions of the Convention.

Signed .....................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)


 Signed.....................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)

Under the provisions of Regulation 8(2) and (4) of Annex I of 
the Convention the validity of this Certificate is extended 
until
.................................................

                             
Signed......................
(Signature of duly authorized 
official)

Place.................
Date.................

(Seal or stamp of the Authority, 
as appropriate)



APPENDIX III

FORM OF OIL RECORD BOOK

OIL RECORD BOOK

I Ñ FOR OIL TANKERS1

1 This Part should be completed for oil tankers including 
combination carriers and asphalt carriers, and those entries 
which are applicable shall be completed for ships other than 
oil tankers which are constructed and utilized to carry oil 
in bulk of an aggregate capacity of 200 cubic metres or 
above. This Part need not be reproduced on an Oil Record Book 
issued to any ship other than those referred to above.

Name of ship ......................... 

Total cargo carrying capacity of ship in cubic metres 
......................................................Voyage 
..........(date).....to .............	(date)
 
a) Loading of oil cargo
1. Date and
place of
loading			
2. Types of
oil loaded			
3. Identity
of tank(s)
loaded			
4. Closing
of applic-
able cargo
tank valves
and applic-
able line
cut-off
valves on
completion
of loading2			

2 Applicable valves and similar devices are those referred to 
in Regulations 20(2)(a)(iii), 23 and 24 of Annex I of the 
Convention.

The undersigned certifies that in addition to the above, all 
sea valves, overboard discharges valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of loading oil cargo.

Date of entry..........    Officer in charge..............

                           Master ........................

b) Internal transfer of oil cargo during voyage

5. Date of
internal transfer		
6. Identity of
tank(s)	
 (i) From	
	(ii) To	
7. Was(were)
tank(s) in 6(i)
emptied?		

The undersigned certifies that in addition to the above, all 
sea valves overboard discharge valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of internal transfer of oil cargo.

Date of entry............. Officer in charge...........
                        Master..................

c) Unloading of oil cargo

8. Date and place of unloading

9. Identity of tank(s) unloaded

10. Was(were) tank(s) emptied?  

11. Opening of applicable cargo tank valves and applicable 
line cut-off valves on completion of unloading2

12. Closing of applicable cargo tank valves and applicable 
line cut off valves on completion of unloading2

2 Applicable valves and similar devices are those referred to 
in Regulation 20(2)(a)(iii), 23 and 24 of Annex I of the 
Convention.

The tank certifies that in addition to the above, all sea 
valves, overboard discharge valves, cargo tank and pipeline 
connections and inter-connections, were secured on completion 
of unloading of oil cargo.

Date of entry...........Officer in charge.............. 
	                   Master .......................

d) Ballasting of cargo tanks

13. Identity of tank(s) ballasted

14. Date and position of ship at start of ballasting

15. If valves connecting cargo lines and segregated ballast 
lines were used give time, date and position of ship when 
valves were (a) opened, and (b) closed

 The undersigned certifies that in addition to the above, all 
sea valves, overboard discharge valves, cargo tank and 
pipeline connections and inter-connections, were secured on 
completion of unloading of oil cargo.

Date of entry.............. Officer in charge................

                            Master ......................

e) Cleaning of cargo tanks
 
16. Identity of tank(s) cleaned
17. Date and duration of cleaning
18. Methods of cleaning3

3 Hand hosing, machine washing and/or chemical cleaning. 
Where chemically cleaned, the chemical concerned and the 
amount used should be stated.

Date of entry...............Officer in charge ............

                            Master ......................

f) Discharge of dirty ballast

19. Identity of tank(s)

20. Date and position of ship at start of discharge to sea

21. Date and position of ship at finish of discharge to sea

22. Ship's speed(s) during discharge

23. Quantity discharged to sea

24. Quantity of polluted water transferred to slop tank(s) 
(identify slop tank(s)

25. Date and port of discharge into shore reception 
facilities (if applicable)

26. Was any part of the discharge conducted during darkness, 
if so, for how long?

27. Was a regular check kept on the effluent and the surface 
of the water in the locality of the discharge?

28. Was any oil observed on the surface of the water in the 
locality of the discharge?


Date of entry.............   Officer in charge .............

                             Master.........................

g) Discharge of water from slop tanks

29. Identity of slop tank(s)

30. Time of settling from last entry of residues, or

31. Time of settling from last discharge

32. Date, time and position of ship at start of discharge

33. Sounding of total contents at start of discharge

34. Sounding of oil/water interface at start of discharge

35. Bulk quantity discharged and rate of discharge

36. Final quantity discharged and rate of discharge

37. Date, time and position of ship at end of discharge

38. Ship's speed(s) during discharge

39. Sounding of oil/water interface at end of discharge

40. Was any part of the discharge conducted during darkness, 
if so, for how long?

41. Was a regular check kept on the effluent and surface of 
the water in the locality of the discharge?

42. Was any oil observed on the surface of the water in the 
locality of the discharge?

Date of entry.............   Officer in charge .............

                             Master.........................


h) Disposal of residues

43. Identity of tank(s)

44. Quantity disposed from each tank

45. Method of disposal of residue:
     (a) Reception of facilities
     (b) Mixed with cargo
     (c) Transferred to another (other)
     tank(s) (identify tank(s)
     (d) Other method (state which)

46. Date and port of disposal of residue

Date of entry.............   Officer in charge .............

                             Master.........................


i) Discharge of clean ballast contained in cargo tanks

47. Date and position of ship at commencement of discharge of 
clean ballast

48. Identity of tank(s) discharged

49. Was(were) the tank(s) empty on completion?

50. Position of vessel on completion if different from 47

51. Was any part of the discharge conducted during darkness, 
if so, for how long?

52. Was a regular check kept on the effluent and the surface 
of the water in the locality of the discharge?

53. Was any oil observed on the surface of the water in the 
locality of the discharge?

Date of entry.............   Officer in charge .............

                             Master.........................


INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION FROM SHIPS, 1973




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INTERNATIONAL CONVENTION FOR THE PREVENTION OF 
POLLUTION FROM SHIPS, 1973

London, 2 November 1973


The Parties to the Convention,

Being conscious of the need to preserve the human environment 
in general and the marine environment in particular,

Recognizing that deliberate, negligent or accidental release 
of oil and other harmful substances from ships constitutes a 
serious source of pollution,

Recognizing also the importance of the International 
Convention for the Prevention of Polution of the Sea by Oil, 
1954, as being the first multilateral instrument to be 
concluded with the prime objective of protecting the 
environment, and appreciating the significant contribution 
which that Convention has made in preserving the seas and 
coastal environment from pollution,

Desiring to achieve the complete elimination of intentional 
pollution of the marine environment by oil and other harmful 
substances and the minimization of accidental discharge of 
such substances,

Considering that this object may best be achieved by 
establishing rules not limited to oil pollution having a 
universal purport,

Have agreed as follows:


Article 1

GENERAL OBLIGATIONS UNDER THE CONVENTION

1 The Parties to the Convention undertake to give effect to 
the provisions of the present Convention and those Annexes 
thereto by which they are bound, in order to prevent the 
pollution of the marine environment by the discharge of 
harmful substances or effluents containing such substances in 
contravention of the Convention.

2. Unless expressly provided otherwise, a referrence to the 
present Convention constitutes at the same time a reference 
to its Protocol and to the Annexes.


Article 2

DEFINITIONS

For the purposes of the present Convention, unless expressly 
provided otherwise:

1. "Regulations" means the Regulations contained in the 
Annexes to the present Convention

2. "Harmful substance" means any substance which, if 
introduced into the sea, is liable to create hazards to human 
health, to harm living resources and marine life, to damage 
amenities or to interfere with other legitimate uses of the 
sea, and includes any substance subject to control by the 
present Convention.

3. a) "Discharge", in relation to harmful substances or 
effluents containing such substances, means any release 
howsoever caused from a ship and includes any escape, 
disposal, spilling, leaking, pumping, emitting or emptying;

b) "Discharge" does not include:

(i) dumping within the meaning of the Convention on the 
Prevention of Marine Pollution by Dumping of Wastes and Other 
Matter, done at London on 13 November 1972; or

(ii) release of harmful substances directly arising from the 
exploration, exploitation and associated off-shore processing 
of sea-bed mineral resources; or

(iii) release of harmful substances for purpose of legitimate 
scientific research into pollution abatement or control.

4. "Ship" means a vessel of any type whatsoever operating in 
the marine environment and includes hydrofoil boats, air-
cushion vehicles, submersibles, floating craft and fixed or 
floating platforms.

5. "Administration" means the Government of the State under 
whose authority the ship is operating. With respect to a ship 
entitled to fly a flag of any State, the Administration is 
the Government of that State. With respect to fixed or 
floating platforms engaged in exploration and exploitation of 
the sea-bed and subsoil thereof adjacent to the coast over 
which the coastal State exercises sovereign rights for the 
purposes of exploration and exploitation of their natural 
resources, the Administration is the Government of the 
coastal State concerned.

6. "Incident" means an event involving the actual or probable 
discharge into the sea of a harmful substance, or effluents 
containing such a substance.

7. "Organization" means the Inter-Governmental Maritime 
Consultative Organization.


Article 3

APPLICATION

1. The present Convention shall apply to:

a) ships entitled to fly the flag of a Party to the 
Convention; and

b) ships not entitled to fly the flag of a Party but which 
operate under the authority of a Party.

2. Nothing in the present Article shall be construed as 
derogating from or extending the sovereign rights of the 
Parties under international law over the sea-bed and subsoil 
thereof adjacent to their coasts for the purposes of 
exploration and exploitation of their natural resources.

3. The present Convention shall not apply to any warship, 
naval auxiliary or other ship owned or operated by a State 
and used, for the time being only on government non-
commercial service. However, each Party shall ensure by the 
adoption of appropriate measures not impairing the operations 
or operational capabilities of such ships owned or operated 
by it, that such ships act in a manner consistent, so far as 
is reasonable and practiable, with the present Convention.


Article 4

VIOLATION

1. Any violation of the requirements of the present 
Convention shall be prohibited and sanctions shall be 
established therefor under the law of the Administration of 
the ship concerned wherever the violation occurs. If the 
Adminsitration is informed of such a violation and is 
satisfied that sufficient evidence is available to enable 
proceedings to be brought in respect of the alleged 
violation, it shall cause such proceedings to be taken as 
soon as possible, in accordance with its law.

2. Any violation of the requirements of the present 
Convention within the jurisdiction of any Party to the 
Convention shall be prohibited and sanctions shall be 
established therefore under the law of that Party. Whenever 
and violation occurs, the Party shall either:

a) cause proceedings to be taken in accordance with its law; 
or

b) furnish to the Administration of the ship such information 
and evidence as may be in its possession that a violation has 
occurred.

3. Where information or evidence with respect to any 
violation of the present Convention by a ship is furnished to 
the Administration of that ship, the Administration shall 
promptly inform the Party which has furnished the information 
or evidence and the Organization, of the action taken.

4. The penalties specified under the law of a Party pursuant 
to the present Article shall be adequate in severity to 
discharge violations of the present Convention and shall be 
equally severe irrespective of where the violations occur.


Article 5

CERTIFICATES AND SPECIAL RULES ON INSPECTION OF SHIPS

1. Subject to the provisions of paragraph (2) of the present 
Article a certificate issued under the authority of a Party 
to the Convention in accordance with the provisions of the 
Regulations shall be accepted by the other Parties and 
regarded for all purposes covered by the present Convention 
as having the same validity as a certificate issued by them.

2. A ship required to hold a certificate in accordance with 
the provisions of the Regulations is subject, while in the 
ports or off-shore terminals under the jurisdiction of a 
Party, to inspection by officers duly authorized by that 
Party. Any such inspection shall be limited to verfying that 
there is on board a valid certificate, unless there are clear 
grounds for believing that the condition of the ship or its 
equipment does not correspond substantially with the 
particulars of that certificate. In that case, or if the ship 
does not carry a valid certificate the Party carrying out the 
inspection shall take such steps as will ensure that the ship 
shall not sail until it can proceed to sea without presenting 
an unreasonable threat of harm to the marine environment. 
That Party may, however, grant such a ship permission to 
leave the port or off-shore terminal for the purpose of 
proceedings to the nearest appropriate repair yard available.

3. If a Party denies a foreign ship entry to the ports or 
off-shore terminals under its jurisdiction or takes any 
action against such a ship for the reason that the ship does 
not comply with the provisions of the present Convention, the 
Party shall immediately inform the consul or diplomatic 
representative of the Party whose flag the ship is entitled 
to fly, or if this is not possible, the Administration of the 
ship concerned. Before denying entry or taking such action 
the Party may request consultation with the Administration of 
the ship concerned. Information shall also be given to the 
Administration when a ship does not carry a valid certificate 
in accordance with the provisions of the Regulations.

4. With respect to the ships of non-Parties to the 
Convention, Parties shall apply the requirements of the 
present Convention as may be necessary to ensure that no more 
favourable treatment is given to such ships.


Article 6

DETECTION OF VIOLATIONS AND ENFORCEMENT OF THE CONVENTION

1. Parties to the Convention shall co-operate in the 
detection of violations and the enforcement of the provisions 
of the present Convention, using all appropriate and 
practicable measures of detection and environmental 
monitoring, adequate procedures for reporting and 
accumulation of evidence.

2. A ship to which the present Convention applies may, in any 
port or off-shore terminal of a Party, be subject to 
inspection by officers appointed or authorized by that Party 
for the purpose of verifying whether the ship has discharged 
any harmful substances in violation of the provisions of the 
Regulations. If an inspection indicates a violation of the 
Convention, a report shall be forwarded to the Administration 
for any appropriate action.

3. Any Party shall furnish to the Administration evidence, if 
any, that the ship had discharged harmful substances in 
violation of the provisions of the Regulations. If it is 
practicable to do so, the competent authority of the former 
Party shall notify the Master of the ship of the alleged 
violation.

4. Upon receiving such evidence, the Administration so 
informed shall investigate the matter, and may request the 
other Party to furnish further or better evidence of the 
alleged contravention. If the Administration is satisfied 
that sufficient evidence is available to enable proceedings 
to be brought in respect of the alleged violation, it shall 
cause such proceedings to be taken in accordance with its law 
as soon as possible. The Administration shall promptly inform 
the Party which has reported the alleged violation, as well 
as the Organization, of the action taken.

5. A Party may also inspect a ship to which the present 
Convention applies when it enters the ports or off-shore 
terminals under its jurisdiction, if a request for an 
investigation is received from any Party together with 
sufficient evidence that the ship has discharged harmful 
substances or effluents containing such substances in any 
place. The report of such investigation shall be sent to the 
Party requesting it and to the Administration so that the 
appropriate action may be taken under the present Convention.


Article 7

UNDUE DELAY TO SHIPS

1. All possible efforts shall be made to avoid a ship being 
unduly detained or delayed under Article 4, 5, or 6 of the 
present Convention.

2. When a ship is unduly detained or delayed under Article 4, 
5, 6 of the present Convention, it shall be entitled to 
compensation for any loss or damage suffered.


Article 8 

REPORTS ON INCIDENTS INVOLVING HARMFUL SUBSTANCES

1. A report of an incident shall be made without delay to the 
fullest extent possible in accordance with the provisions of 
Protocol I to the present Convention.

2. Each Party to the Convention shall:

a) make all arrangements necessary for an appropriate officer 
or agency to receive and process all reports on incidents; 
and

b) notify the Organization with complete details of such 
arrangements for circulation to other Parties and Member 
States of the Organization.

3. Whenever a Party receives a report under the provisions of 
the present Article, the Party shall relay the report without 
delay to:

a) the Administration of the ship involved; and 

b) any other State which may be affected.

4. Each Party to the Convention undertakes to issue 
instructions to its maritime inspection vessels and aircraft 
and to other appropriate services to report to its 
authorities any incident referred to in Protocol I to the 
present Convention. That Party shall, if it considers it 
appropriate, report accordingly to the Organization and to 
any other party concerned.


Article 9

OTHER TREATIES AND INTERPRETATION

1. Upon its entry into force, the present Convention 
supersedes the International Convention for the Prevention of 
Pollution of the Sea by Oil, 1954, as amended, as between 
Parties to that Convention.

2. Nothing in the present Convention shall prejudice the 
codification and development of the law of the sea by the 
United Nations Conference on the Law of the Sea convened 
pursuant to Resolution 2750 C (XXV) of the General Assembly 
of the United Nations nor the present or future claims and 
legal views of any State concerning the law of the sea and 
the nature and extent of coastal and flag State jurisdiction.

3. The term "jurisdiction" in the present Convention shall be 
construed in the light of international law in force at the 
time of application or interpretation of the present 
Convention.


Article 10

SETTLEMENT OF DISPUTES

Any dispute between two or more Parties to the Convention 
concerning the interpretation or application of the present 
Convention shall, if settlement by negotiation between the 
Parties involved has not been possible, and if these Parties 
do not otherwise agree, be submitted upon request of any of 
them to arbitration as set out in Protocol II to the present 
Convention.


Article 11

COMMUNICATION OF INFORMATION

1. The Parties to the Convention undertake to communicate to 
the Organization:

a) the text of laws, orders, decrees and regulations and 
other instruments which have been promulgated on the various 
matters within the scope of the present Convention;

b) a list of non-governmental agencies which are authorized 
to act on their behalf in matters relating to the design, 
construction and equipment of ships carrying harmful 
substances in accordance with the provisions of the 
Regulations;

c) a sufficient number of specimens of their certificates 
issued under the provisions of the Regulations;

d) a list of reception facilities including their location, 
capacity and available facilities and other characteristics;

e) official reports or summaries of official reports in so 
far as they show the results of the application of the 
present Convention; and

f) an annual statistical report, in a form standardized by 
the Organization, of penalties actually imposed for 
infringement of the present Convention.

2. The Organization shall notify Parties of the receipt of 
any communications under the present Article and circulate to 
all Parties any information communicated to it under sub-
paragraphs (1) (b) to (f) of the present Article.


Article 12

CASUALTIES TO SHIPS

1. Each Administration undertakes to conduct an investigation 
of any casualty occuring to any of its ships subject to the 
provisions of the Regulations if such casualty has produced a 
major deleterious effect upon the marine environment.

2. Each Party to the Convention undertakes to supply the 
Organization with information concerning the findings of such 
investigation, when it judges that such information may 
assist in determining what changes in the present Convention 
might be desirable.


Article 13

SIGNATURES, RATIFICATION, ACCEPTANCE, APPROVAL AND ACCESSION

1. The present Convention shall remain open for signature at 
the Headquarters of the Organization from 15 January 1974 
until 31 December 1974 and shall thereafter remain open for 
accession. States may become Parties to the present 
Convention by:

a) signature without reservation as to ratification, 
acceptance or approval; or

b) signature subject to ratification, acceptance or approval, 
followed by ratification, acceptance or approval; or

c) accession.

2. Ratification, acceptance, approval or accession shall be 
effected by the deposit of an instrument to that effect with 
the Secretary-General of the Organization.

3. The Secretary-General of the Organization shall inform all 
States which have signed the present Convention or acceded to 
it of any signature or of the deposit of any new instrument 
of ratification, acceptance, approval or accession and the 
date of its deposit.


Article 14

OPTIONAL ANNEXES

1. A State may at the time of signing, ratifying, accepting, 
approving or acceding to the present Convention declare that 
it does not accept any one or all of Annexes III, IV, and V 
(hereinafter referred to as "Optional Annexes") of the 
present Convention. Subject to the above, Parties to the 
Convention shall be bound by any Annex in its entirety.

2. A State which has declared that it is not bound by an 
Optional Annex may at any time accept such Annex by 
depositing with the Organization an instrument of the kind 
referred to in Article 13 (2).

3. A State which makes a declaration under paragraph (1) of 
the present Article in respect of an Optional Annex and which 
has not subsequently accepted that Annex in accordance with 
paragraph (2) of the present Article shall not be under any 
obligation nor entitled to claim any privileges under the 
present Convention in respect of matters related to such 
Annex and all reference to Parties in the present Convention 
shall include that State in so far as matters related to such 
Annex are concerned.

4. The Organization shall inform the States which have signed 
or acceded to the present Convention of any declaration under 
the present Article as well as the receipt of any instrument 
deposited in accordance with the provisions of paragraph (2) 
of the present Article.


Article 15

ENTRY INTO FORCE

1. The Convention shall enter into force twelve months after 
the date on which not less than 15 States, the combined 
merchant fleets of which constitute not less than fifty per 
cent of the gross tonnage of the world's merchant shipping, 
have become parties to it in accordance with Article 13.

2. An Optional Annex shall enter into force twelve months 
after the date on which the conditions stipulated in 
paragraph (1) of the present Article have been satisfied in 
relation to that Annex.

3. The Organization shall inform the States which have signed 
the present Convention or acceded to it of the date on which 
it enters into force and of the date on which the Optional 
Annex enters into force in accordance with paragraph (2) of 
the present Article.

4. For States which have deposited an instrument of 
ratification, acceptance, approval or accession in respect of 
the present Convention or any Optional Annex after the 
requirements for entry into force thereof have been met but 
prior to the date of entry into force, the ratification, 
accepance, approval or accession shall take effect on the 
date of entry into force of the Convention or such Annex or 
three months after the date of deposit of the instrument 
whichever is the later date.

5. For States which have deposited an instrument of 
ratification, acceptance, approval or accession after the 
date on which the Convention or an Optional Annex entered 
into force, the Convention or the Optional Annex shall become 
effective three months after the date of deposit of the 
instrument.

6. After the date on which all the conditions required under 
Article 16 to bring an amendment to the present Convention or 
an Optional Annex into force have been fulfilled, any 
instrument of ratification, acceptance, approval or accession 
deposited shall apply to the Convention or Annex as amended.


Article 16

AMENDMENTS

1. The present Convention may be amended by any of the 
procedures specified in the following paragraphs.

2. Amendments after consideration by the Organization:

a) any amendment proposed by a Party to the Convention shall 
be submitted to the Organization and circulated by its 
Secretary-General to all Members of the Organization and all 
Parties at least six months prior to its consideration;

b) any amendment proposed and circulated as above shall be 
submitted to an appropriate body by the Organization for 
consideration;

c) Parties to the Convention, whether or not Members of the 
Organization, shall be entitled to participate in the 
proceedings of the appropriate body;

d) amendments shall be adopted by a two-thirds majority of 
only the Parties to the Convention present and voting;

e) if adopted in accordance with sub-paragraph c) above, 
amendments shall be communicated by the Secretary-General of 
the Organization to all the Parties to the Convention for 
acceptance;

f) an amendment shall be deemed to have been accepted in the 
following circumstances:

(i) an amendment to an Article of the Convention shall be 
deemed to have been accepted on the date on which it is 
accepted by two-thirds of the Parties, the combined merchant 
fleets of which constitute not less than fifty per cent of 
the gross tonnage of the world's merchant fleet;

(ii) an amendment to an Annex to the Convention shall be 
deemed to have been accepted in accordance with the procedure 
specified in subparagraph (f) (iii) unless the appropriate 
body, at the time of its adoption, determines that the 
amendment shall be deemed to have been accepted on the date 
on which it is accepted by two-thirds of the Parties, the 
combined merchant fleets of which constitute not less than 
fifty per cent of the gross tonnage of the world's merchant 
fleet. Nevertheless, at any time before the entry into force 
of an amendment to an Annex to the Convention, a Party may 
notify the Secretary-General of the Organization that its 
express approval will be necessary before the amendment 
enters into force for it. The latter shall bring such 
notification and the date of its receipt to the notice of 
Parties.

(iii) an amendment to an Appendix to an Annex to the 
Convention shall be deemed to have been accepted at the end 
of a period to be determined by the appropriate body at the 
time of its adoption, which period shall be not less than ten 
months, unless within that period an objection is 
communicated to the Organization by not less than one-third 
of the Parties or by the Parties the combined merchant fleets 
of which constitute not less than fifty per cent of the gross 
tonnage of the world's merchant fleet whichever condition is 
fulfilled;

 (iv) an amendment to Protocol I to the Convention shall be 
subject to the same procedures as for the amendments to the 
Annexes to the Convention, as provided for in sub-paragraphs 
(f) (ii) or (f) (iii), above;

(v) an amendment to Protocol II to the Convention shall be 
subject to the same procedures as for the amendments to an 
Article of the Convention, as provided for in sub-paragraph 
(f) (i) above;

g) the amendment shall enter into force under the following 
conditions:

(i) in the case of an amendment to an Article of the 
Convention, to Protocol II, or to Protocol I or to an Annex 
to the Convention not under the procedure specified in sub-
paragraph (f) (iii), the amendment accepted in conformity 
with the foregoing provisions shall enter into force six 
months after the date of its acceptance with respect to the 
Parties which have declared that they have accepted it;

 (ii) in the case of an amendment to Protocol I, to an 
Appendix to an Annex or to an Annex to the Convention under 
the procedure specified in subparagraph (f) (iii), the 
amendment deemed to have been accepted in accordance with the 
foregoing conditions shall enter into force six months after 
its acceptance for all the Parties with the exception of 
those which, before that date, have made a declaration that 
they do not accept it or a declaration under sub-paragraph 
(f) (ii), that their express approval is necessary.

3. Amendment by a Conference.

a) Upon the request of a Party, concurred in by at least one-
third of the Parties, the Organization shall convene a 
Conference of Parties to the Convention to consider 
amendments to the present Convention.

b) Every amendment by such a Conference by a two-thirds 
majority of those present and voting of the Parties shall be 
communicated by the Secretary-General of the Organization to 
all Contracting Parties for their acceptance.

c) Unless the Conference decides otherwise, the amendment 
shall be deemed to have been accepted and to have entered 
into force in accordance with the procedures specified for 
that purpose in paragraph (2) (f) and (g) above.

4. a) In the case of an amendment to an Optional Annex, a 
reference in the present Article to a "Party to the 
Convention" shall be deemed to mean a reference to a Party 
bound by that Annex.

b) Any Party which has declined to accept an amendment to an 
Annex shall be treated as a non-Party only for the purpose of 
application of that Amendment.

5. The adoption and entry into force of a new Annex shall be 
subject to the same procedures as for the adoption and entry 
into force of an Article of the Convention.

6. Unless expressly provided otherwise, any amendment to the 
present Convention made under this Article, which relates to 
the structure of a ship, shall apply only to ships for which 
the building contract is placed, or in the absence of a 
building contract, the keel of which is laid, on or after the 
date on which the amendment comes into force.

7. Any amendment to a Protocol or to an Annex shall relate to 
the substance of that Protocol or Annex and shall be 
consistent with the Articles of the present Convention.

8. The Secretary-General of the Organization shall inform all 
Parties of any amendments which enter into force under the 
present Article, together with the date on which each such 
amendment enters into force.

9. Any declaration of acceptance or of objection to an 
amendment under the present Article shall be notified in 
writing to the Secretary-General of the Organization. The 
latter shall bring such notification and the date of its 
receipt to the notice of the Parties to the Convention.


Article 17

PROMOTION OF TECHNICAL CO-OPERATION

The Parties to the Convention shall promote in consultation 
with the Organization and other international bodies, with 
assistance and coordination by the Executive Director of the 
United Nations Environment Programme, support for those 
Parties which request technical assistance for:

a) the training of scientific and technical personnel;

b) the supply of necessary equipment and facilities for 
reception and monitoring;

c) the facilitation of other measures and arrangements to 
prevent or mitigate pollution of the marine environment by 
ships; and

d) the encouragement of research;

preferably within the countries concerned, so furthering the 
aims and purposes of the present Convention.


Article 18

DENUNCIATION

1. The present Convention or any Optional Annex may be 
denounced by any Party to the Convention at any time after 
the expiry of five years from the date on which the 
Convention or such Annex enters into force for that Party.

2. Denunciation shall be effected by notification in writing 
to the Secretary-General of the Organization who shall inform 
all the other Parties of any such notification received and 
of the date of its receipt as well as the date on which such 
denunciation takes effect.

3. A denunciation shall take effect twelve months after 
receipt of the notification of denunciation by the Secretary-
General of the Organization or after the expiry of any other 
longer period which may be indicated in the notification.


Article 19

DEPOSIT AND REGISTRATION

1. The present Convention shall be deposited with the 
Secretary-General of the Organization who shall transmit 
certified true copies thereof to all States which have signed 
the present Convention or acceded to it.

2. As soon as the present Convention enters into force, the 
text shall be transmitted by the Secretary-General of the 
Organization to the Secretary-General of the United Nations 
for registration and publication, in accordance with Article 
102 of the Charter of the United Nations.


Article 20

LANGUAGES

The present Convention is established in a single copy in the 
English, French, Russian and Spanish languages, each text 
being equally authentic. Official translations in the Arabic, 
German, Italian and Japanese languages shall be prepared and 
deposited with the signed original.

In Witness Whereof the undersigned * being duly authorized by 
their respective Governments for that purpose have signed the 
present Convention.

* Signatures omitted.

Done at London this second day of November, one thousand nine 
hundred and seventy-three.


PROTOCOL I

Provisions Concerning Reports on Incidents Involving 
Harmful Substances 
(in accordance with Article 8 of the Convention)


Article I 

DUTY TO REPORT

1. The Master of a ship involved in an incident referred to 
in Article III of this Protocol, or other person having 
charge of the ship, shall report the particulars of such 
incident without delay and to the fullest extent possible in 
accordance with the provisions of this Protocol.

2. In the event of the ship referred to in paragraph (1) of 
the present Article being abandoned, or in the event of a 
report from such ship being incomplete or unobtainable, the 
owner, charterer, manager or operator of the ship, or their 
agents shall, to the fullest extent possible assume the 
obligations placed upon the Master under the provisions of 
this Protocol.


Article II

METHODS OF REPORTING

1. Each report shall be made by radio whenever possible, but 
in any case by the fastest channels available at the time the 
report is made. Reports made by radio shall be given the 
highest possible priority.

2. Reports shall be directed to the appropriate officer or 
agency specified in paragraph (2)(a) of Article 8 of the 
Convention.


Article III 

WHEN TO MAKE REPORTS

The report shall be made whenever an incident involves:

a) a discharge other than as permitted under the present 
Convention; or

b) a discharge permitted under the present Convention by 
virtue of the fact that:

(i) it is for the purpose of securing the safety of a ship or 
saving life at sea; or

(ii) it results from damage to the ship or its equipment; or

c) a discharge of a harmful substance for the purpose of 
combating a specific pollution incident or for purposes of 
legitimate scientific research into pollution abatement or 
control; or

d) the probability of a discharge referred to in sub-
paragraphs (a), (b) or (c) of this Article.


Article IV

CONTENTS OF REPORT 

1. Each report shall contain in general: 

a) the identity of the ship;

b) the time and date of the occurence of the incident;

c) the geographic position of the ship when the incident 
occurred;

d) the wind and sea conditions prevailing at the time of the 
incident; and 

2. Each report shall contain, in particular:

a) a clear indication or description of the harmful 
substances involved, including, if possible, the correct 
technical names of such substances (trade names should not be 
used in place of the correct technical names);

b) a statement or estimate of quantities, concentrations and 
likely conditions of harmful substances discharged or likely 
to be discharged into the sea; 

c) where relevant, a description of the packaging and 
identifying marks; and

d) if possible the name of the consignor, consignee or 
manufacturer.

3. Each report shall clearly indicate whether the harmful 
substance discharged, or likely to be discharged is oil, a 
noxious liquid substance, a noxious solid substance or a 
noxious gaseous substance and whether such substance was or 
is carried in bulk or contained in packaged form, freight 
containers, portable tanks, or road and rail tank wagons.

4. Each report shall be supplemented as necessary by any 
other relevant information requested by a recipient of the 
report or which the person sending the report deems 
appropriate.


Article V

SUPPLEMENTARY REPORT 

Any person who is obliged under the provisions of this 
Protocol to send a report shall. when possible: 

a) supplement the initial report, as necessary, with 
information concerning further developments; and 

b) comply as fully as possible with requests from affected 
States for additional information concerning the incident.



PROTOCOL II

Arbitration 
(in accordance with Article 10 of the Convention)


Article I

Arbitration procedure, unless the Parties to the dispute 
decide otherwise, shall be in accordance with the rules set 
out in this Protocol.


Article II

1. An Arbitration Tribunal shall be established upon the 
request of one Party to the Convention addressed to another 
in application of Article 10 of the present Convention. The 
request for arbitration shall consist of a statement of the 
case together with any supporting documents.

 2. The requesting Party shall inform the Secretary-General 
of the Organization of the fact that it has applied for the 
establishment of a Tribunal, of the names of the Parties to 
the dispute and of the Articles of the Convention or 
Regulations over which there is in its opinion disagreement 
concerning their interpretation or application. The 
Secretary-General shall transmit this information to all 
Parties.


Article III

The Tribunal shall consist of three members: one Arbitrator 
nominated by each Party to the dispute and a third Arbitrator 
who shall be nominated by agreement between the two first 
named, and shall act as its Chairman.


Article IV

1. If, at the end of a period of sixty days from the 
nomination of the second Arbitrator, the Chairman of the 
Tribunal shall not have been nominated, the Secretary-General 
of the Organization upon request of either Party shall within 
a furhter period of sixty days proceed to such nomination, 
selecting him from a list of qualified persons previously 
drawn up by the Council of the Organization.

2. If, within a period of sixty days from the date of the 
receipt of the request, one of the Parties shall not have 
nominated the member of the Tribunal for whose designation it 
is responsible, the other Party may directly inform the 
Secretary-General of the Organization who shall nominate the 
Chairman of the Tribunal within a period of sixty days, 
selecting him from the list prescribed in paragraph (1) of 
the present Article.

3. The Chairman of the Tribunal shall, upon nomination, 
request the Party which has not provided an Arbitrator, to do 
so in the same manner and under the same conditions. If the 
Party does not make the required nomination, the Chairman of 
the Tribunal shall request the Secretary-General of the 
Organization to make the nomination in the form and 
conditions prescribed in the preceding paragraph.

4. The Chairman of the Tribunal, if nominated under the 
provisions of the present Article, shall not be or have been 
a national of one of the Parties concerned, except with the 
consent of the other Party.

5. In the case of the decease or default of an Arbitrator for 
whose nomination one of the Parties is responsible, the said 
Party shall nominate a replacement within a period of sixty 
days from the date of decease or default. Should the said 
Party not make the nomination, the arbitration shall proceed 
under the remaining Arbitrators. In case of the decease or 
default of the Chairman of the Tribunal, a replacement shall 
be nominated in accordance with the provisions of Article III 
above, or in the absence of agreement between the members of 
the Tribunal within a period of sixty days of the decease or 
default, according to the provisions of the present Article.


Article V

The Tribunal may hear and determine counter-claims arising 
directly out of the subject matter of this dispute.


Article VI

Each Party shall be responsible for the remuneration of its 
Arbitrator and connected costs and for the costs entailed by 
the preparation of its own case. The remuneration of the 
Chairman of the Tribunal and of all general expenses incurred 
by the Arbitration shall be borne equally by the Parties. The 
Tribunal shall keep a record of all its expenses and shall 
furnish a final statement thereof.


Article VII

Any Party to the Convention which has an interest of a legal 
nature and which may be affected by the decision in the case 
may, after giving written notice to the Parties which have 
originally initiated the procedure, join in the arbitration 
procedure with the consent of the Tribunal.


Article VIII

Any Arbitration Tribunal established under the provision of 
the present Protocol shall decide its own rules of procedure.


Article IX

1. Decisions of the Tribunal both as to its procedure and its 
place of meeting and as to any question laid before it, shall 
be taken by majority votes of its members; the absence or 
abstention of one of the members of the Tribunal for whose 
nomination the Parties were responsible shall not constitute 
an impediment to the Tribunal reaching a decision. In cases 
of equal voting, the vote of the Chairman shall be decisive.

2. The Parties shall facilitate the work of the Tribunal and 
in particular, in accordance with their legislation, and 
using all means at their disposal:

a) provide the Tribunal with the necessary documents and 
information;

b) enable the Tribunal to enter their territory, to hear 
witnesses or experts, and to visit the scene.

3. Absence or default of one Party shall not constitute an 
impediment to the procedure.


Article X

1. The Tribunal shall render its award within a period of 
five months from the time it is established unless it 
decides, in the case of necessity, to extend the time limit 
for a further period but not exceeding three months. The 
award of the Tribunal shall be accompanied by a statement of 
reasons. It shall be final and without appeal and shall be 
communicated to the Secretary-General of the Organization. 
The Parties shall immediately comply with the award.

2. Any controversy which may arise between the Parties as 
regards interpretation or execution of the award may be 
submitted by either Party for judgement to the Tribunal which 
made the award or, if it is not available to another Tribunal 
constituted for this purpose, in the same manner as the 
original Tribunal.



ANNEX I

REGULATIONS FOR THE PREVENTION OF POLLUTION BY OIL

Chapter I Ñ General


Regulation 1

DEFINITIONS 

For the purposes of this Annex:

1. "Oil" means petroleum in any form including crude oil, 
fuel oil, sludge, oil refuse and refined products (other than 
petrochemicals which are subject to the provisions of Annex 
II of the present Convention) and, without limiting the 
generality of the foregoing, includes the substances listed 
in Appendix I to this Annex.

2. "Oily mixture" means a mixture with any oil content.

3. "Oil fuel" means any oil used as fuel in connexion with 
the propulsion and auxiliary machinery of the ship in which 
such oil is carried.

4. "Oil tanker" means a ship constructed or adapted primarily 
to carry oil in bulk in its cargo spaces and includes 
combination carriers and any "chemical tanker" as defined in 
Annex II of the present Convention when it is carrying a 
cargo or part cargo of oil in bulk.

5. "Combination carrier" means a ship designed to carry 
either oil or solid cargoes in bulk. 

6. "New ship" means a ship:

a) for which the building contract is placed after 31 
December 1975; or

b) in the absence of a building contract, the keel of which 
is laid or which is at a similar stage of construction after 
30 June 1976; or

c) the delivery of which is after 31 December 1979; or 

d) which has undergone a major conversion:

(i) for which the contract is placed after 31 December 1975; 
or

(ii) in the absence of a contract, the construction work of 
which is begun after 30 June 1976; or 

(iii) which is completed after 31 December 1979. 

7. "Existing ship" means a ship which is not a new ship.

8. "Major conversion" means a conversion of an existing ship:

a) which substantially alters the dimensions or carrying 
capacity of the ship; or 

b) which changes the type of the ship; or

c) the intent of which in the opinion of the Administration 
is substantially to prolong its life; or 

d) which otherwise so alters the ship that if it were a new 
ship, it would become subject to relevant provisions of the 
present Convention not applicable to it as an existing ship.

9. "Nearest land". The term "from the nearest land" means 
from the baseline from which the territorial sea of the 
territory in question is established in accordance with 
international law, except that for the purposes of the 
present Convention "from the nearest land" off the north 
eastern coast of Australia shall mean from a line drawn from 
a point on the coast of Australia in latitude 11 deg 00 deg 
South, longitude 142 deg 08 min East to a point in latitude 
10 deg 35 min South,

longitude 141 deg 55 min East Ñ thence to a point latitude 10 
deg 00 min South,

longitude 142 deg 00 min East, thence to a point latitude 9 
deg 10 min South,

longitude 143 deg 52 min East, thence to a point latitude 9 
deg 00 min South,

longitude 144 deg 00 min East, thence to a point latitude 15 
deg min South,

longitude 147 deg 00 min East, thence to a point latitude 21 
deg 00 min South,

longitude 153 deg 00 min East, thence to a point on the coast 
of Australia in latitude 24 deg 42 deg South, longitude 153 
deg 15 min East.

10. "Special area" means a sea where for recognized technical 
reasons in relation to its oceanographical and ecological 
condition and to the particular character of its traffic the 
adoption of special mandatory methods for the prevention of 
sea pollution by oil is required. Special areas shall include 
those listed in Regulation 10 of this Annex.

11. "Instantaneous rate of discharge of oil content" means 
the rate of discharge of oil litres per hour at any instant 
divided by the speed of the ship in knots at the same 
instant.

12. "Tank" means an enclosed space which is formed by the 
permanent structure of a ship and which is designed for the 
carriage of liquid in bulk.

13. "Wing tank" means any tank adjacent to the side shell 
plating.

14. "Centre tank" means any tank inboard of a longitudinal 
bulkhead.

15. "Slop tank" means a tank specifically designated for the 
collection of tank drainings, tank washings and other oily 
mixtures.

16. "Clean ballast" means the ballast in a tank which since 
oil was last carried therein, has been so cleaned that 
effluent therefrom if it were discharged from a ship which is 
stationary into clean calm water on a clear day would not 
produce visible traces of oil on the surface of the water or 
upon adjoining shorelines or cause a sludge or emulsion to be 
deposited beneath the surface of the water or upon adjoining 
shorelines. If the ballast is discharged through an oil 
discharge monitoring and control system approved by the 
Administration, evidence based on such a system to the effect 
that the oil content of the effluent did not exceed 15 parts 
per million shall be determinative that the ballast was 
clean, notwithstanding the presence of visible traces.

17. "Segregated ballast" means the ballast water introduced 
into a tank which is completely separated from the cargo oil 
and oil fuel system and which is permanently allocated to the 
carriage of ballast or to the carriage of ballast or cargoes 
other than oil or noxious substances as variously defined in 
the Annexes of the present Convention.

18. "Length" (L) means 96 per cent of the total length on a 
waterline at 85 per cent of the least moulded depth measured 
from the top of the keel, or the length from the foreside of 
the stem to the axis of the rudder stock on that waterline, 
if that be greater. In ships designed with a rake of keel the 
waterline on which this length is measured shall be parallel 
to the designed waterline. The length (L) shall be measured 
in meters.

19. "Forward and after perpendiculars" shall be taken at the 
forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on 
the waterline on which the length is measured.

20. "Amidships" is at the middle of the length (L).

21. "Breadth" (B) means the maximum breadth of the ship, 
measured amidships to the moulded line of the frame in a ship 
with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material. The breadth (B) 
shall be measured in meters.

22. "Deadweight" (DW) means the difference in metric tons 
between the displacement of a ship in water of specific 
gravity of 1.025 at the load waterline corresponding to the 
assigned number freeboard and the lightweight of the ship.

23. "Lightweight" means the displacement of a ship in metric 
tons without cargo, oil fuel, lubricating oil, ballast water, 
fresh water and feedwater in tanks, consumable stores, 
passengers and their effects.

24. "Permeability" of a space means the ratio of the volume 
within that space which is assumed to be occupied by water to 
the total volume of that space.

25. "Volumes" and "areas" in a ship shall be calculated in 
all cases to moulded lines.


Regulation 2 

APPLICATION

1. Unless expressly provided otherwise, the provisions of 
this Annex shall apply to all ships.

2. In ships other than oil tankers fitted with cargo spaces 
which are constructed and utilized to carry oil in bulk of an 
aggregate capacity of 200 cubic meters or more, the 
requirements of Regulations 9, 10, 14, 15 (1), (2) and (3), 
18, 20 and 24 (4) of this Annex for oil tankers shall apply 
to the construction and operation of those spaces, except 
that where such aggregate capacity is less than 1,000 cubic 
metres the requirements of Regulation 15(4) of this Annex may 
apply in lieu of Regulation 15(1), (2) and (3).

3. Where a cargo subject to the provisions of Annex II of the 
present Convention is carried in a cargo space of an oil 
tanker, the appropriate requirements of Annex II of the 
present Convention shall also apply.

4. a) Any hydrofoil, air-cushion vehicle and other new type 
of vessel (near-surface craft, submarine craft, etc) whose 
constructional features are such as to render the application 
of any of the provisions of Chapters II and III of this Annex 
relating to construction and equipment unreasonable or 
impracticable may be exempted by the Administration from such 
provisions, provided that the construction and equipment of 
that ship provides equivalent protection against pollution by 
oil, having regard to the service for which it is intended.

b) Particulars of any such exemption granted by the 
Administration shall be indicated in the Certificate referred 
to in Regulation 5 of this Annex.

c) The Administration which allows any such exemption shall, 
as soon as possible, but not more than ninety days 
thereafter, communicate to the Organization particulars of 
same and the reasons therefor, which the Organization shall 
circulate to the Parties to the Convention for their 
information and appropriate action, if any.


Regulation 3

EQUIVALENTS

1. The Administration may allow any fitting, material, 
appliance or apparatus to be fitted in a ship as an 
alternative to that required by this Annex if such fitting, 
material, appliance or apparatus is at least as effective as 
that required by this Annex. This authority of the 
Administration shall not extend to subsitution of operational 
methods to effect the control of discharge of oil as 
equivalent to those design and construction features which 
are prescribed by Regulations in this Annex.

2. The Administration which allows a fitting, material, 
appliance or apparatus, as an alternative to that required by 
this Annex shall communicate to the Organization for 
circulation to the Parties to the Convention particulars 
thereof, for their information and appropriate action, if 
any.


Article 4

SURVEYS

1. Every oil tanker of 150 tons gross tonnage and above, and 
every other ship of 400 tons gross tonnage and above shall be 
subject to the surveys specified below:

a) An initial survey before the ship is put in service or 
before the Certificate required under Regulation 5 of this 
Annex is issued for the first time, which shall include a 
complete survey of its structure, equipment, fittings, 
arrangements and material in so far as the ship is covered by 
this Annex. This survey shall be such as to ensure that the 
structure, equipment, fittings, arrangements and material 
fully comply with the applicable requirements of this Annex.

b) Periodical surveys at intervals specified by the 
Administration, but not exceeding five years, which shall be 
such as to ensure that the structure, equipment, fittings, 
arrangements and material fully comply with the applicable 
requirements of this Annex. However, where the duration of 
the International Oil Pollution Certificate (1973) is 
extended as specified in Regulation 8 (3) or (4) of this 
Annex, the interval of the periodical survey may be extended 
correspondingly.

c) Intermediate surveys at intervals specified by the 
Administration but not exceeding thirty months, which shall 
be such as to ensure that the equipment and associated pump 
and piping systems, including oil discharge monitoring and 
control systems, oily-water separating equipment and oil 
filtering systems, fully comply with the applicable 
requirements of this Annex and are in good working order. 
Such intermediate surveys shall be endorsed on the 
International Oil Pollution Prevention Certificate (1973) 
issued under Regulation 5 of this Annex.

2. The Administration shall establish appropriate measures 
for ships which are not subject to the provisions of 
paragraph (1) of this Regulation in order to ensure that the 
applicable provisions of this Annex are complied with.

3. Surveys of the ship as regards enforcement of the 
provisions of this Annex shall be carried out by officers of 
the Administration. The Administration may, however, entrust 
the surveys either to surveyors nominated for the purpose or 
to organizations recognized by it. In every case the 
Administration concerned fully guarantees the completeness 
and efficiency of the surveys.

4. After any survey of the ship under this Regulation has 
been completed, no significant change shall be made in the 
structure, equipment, fittings, arrangements or material 
covered by the survey without the sanction of the 
Administration, except the direct replacement of such 
equipment or fittings.


Regulation 5

ISSUE OF CERTIFICATE

1. An International Oil Pollution Certificate (1973) shall be 
issued, after survey in accordance with the provisions of 
Regulation 4 of this Annex, to any oil tanker of 150 tons 
gross tonnage and above and any other ships of 400 tons gross 
tonnage and above which are engaged in voyages to ports or 
off-shore terminals under the jurisdiction of other Parties 
to the Convention. In the case of existing ships this 
requirement shall apply twelve months after the date of entry 
into force of the present Convention.

2. Such Certificate shall be issued either by the 
Administration or by any persons or organization duly 
authorized by it. In every case the Administration assumes 
full responsibility for the Certificate.


Regulation 6

ISSUE OF A CERTIFICATE BY ANOTHER GOVERNMENT

1. The Government of a Party to the Convention may, at the 
request of the Administration, cause a ship to be surveyed 
and, if satisfied that the provisions of this Annex are 
complied with, shall issue or authorize the issue of an 
International Oil Pollution Prevention Certificate (1973) to 
the ship in accordance with this Annex.

2. A copy of the Certificate and a copy of the survey report 
shall be transmitted as soon as possible to the requesting 
Administration.

3. A Certificate so issued shall contain a statement to the 
effect that it has been issued at the request of the 
Administration and it shall have the same force and receive 
the same force and receive the same recogimition as the 
Certificate issued under Regulation 5 of this Annex.

4. No International Oil Pollution Prevention Certificate 
(1973) shall be issued to a ship which is entitled to fly the 
flag of a State which is not a Party.


Regulation 7

FORM OF CERTIFICATE

The International Oil Pollution Prevention Certificate (1973) 
shall be drawn up in an official language of the issuing 
country in the form corresponding to the model given in 
Appendix II to this Annex. If the language used is neither 
English nor French, the text shall include a translation into 
one of these languages.


Regulation 8

DURATION OF CERTIFICATE

1. An International Oil Pollution Prevention Certificate 
(1973) shall be issued for a period specified by the 
Administration, which shall not exceed five years from the 
date of issue, except as provided in paragraphs (2), (3) and 
(4) of this Regulation.

2. If a ship at the time when the Certificate expires is not 
in a port or off-shore terminal under the jurisdiction of the 
Party to the Convention whose flag the ship is entitled to 
fly, the Certificate may be extended by the Administration, 
but such extension shall be granted only for the purpose of 
allowing the ship to complete its voyage to the State whose 
flag the ship is entitled to fly or in which it is to be 
surveyed and then only in cases where it appears proper and 
reasonable to do so.

3. No Certificate shall be thus extended for a period longer 
than five months and a ship to which such extension is 
granted shall not on its arrival in the State whose flag it 
is entitled to fly or the port in which it is to be surveyed, 
be entitled by virtue of such extension to leave that port or 
State without having obtained a new Certificate.

4. A Certificate which has not been extended under the 
provisions of paragraph (2) of this Regulation may be 
extended by the Administration for a period of grace of up to 
one month from the date of expiry stated on it.

5. A Certificate shall cease to be valid if significant 
alterations have taken place in the construction, equipment, 
fittings, arrangements, or material required without the 
sanction of the Administration, except the direct replacement 
of such equipment or fittings, or if intermediate surveys as 
specified by the Administration under Regulation 4(1)(c) of 
this Annex are not carried out.

6. A Certificate issued to a ship shall cease to be valid 
upon transfer of such a ship to the flag of another State, 
except as provided in paragraph (7) of this Regulation.

7. Upon transfer of a ship to the flag of another Party, the 
Certificate shall remain in force for a period not exceeding 
five months provided that it would not have expired before 
the end of that period, or until the Administration issues a 
replacement Certificate, whichever is earlier. As soon as 
possible after the transfer has taken place the Government of 
the Party whose flag the ship was formerly entitled to fly 
shall transmit to the Administration a copy of the 
Certificate carried by the ship before the transfer and, if 
availbale, a copy of the relevant survey report.


Chapter II

REQUIREMENTS FOR CONTROL OF OPERATIONAL POLLUTION


Regulation 9

CONTROL OF DISCHARGE OF OIL

1. Subject to the provisions of Regulations 10 and 11 of this 
Annex and paragraph (2) of this Regulation, any discharge 
into the sea of oil or oily mixtures from ships to which this 
Annex applies shall be prohibited except when all the 
following conditions are satisfied:

a) for an oil tanker, except as provided for in subparagraph 
(b) of this paragraph:

(i) the tanker is not within a special area;

(ii) the tanker is more than 50 nautical miles from the 
nearest land;

(iii) the tanker is proceeding en route;

(iv) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per nautical mile;

(v) the total quantity of oil discharged into the sea does 
not exceed for existing tankers 1/15,000 of the total 
quantity of the particular cargo of which the residue formed 
a part, and for new tankers 1/30,000 of the total quantity of 
the particular cargo of which the residue formed a part; and

(vi) the tanker has in operation, except as provided for in 
Regulation 15(3) of this Annex, an oil discharge monitoring 
and control system and a slop tank arrangements as required 
by Regulation 15 of this Annex;

b) from a ship of 400 tons gross tonnage and above other than 
an oil tanker and from machinery space bilges excluding cargo 
pump room bilges of an oil tanker unless mixed with oil cargo 
residue:

 (i) the ship is not within a special area;
(ii) the ship is more than 12 nautical miles from the nearest 
land;
(iii) the ship is proceeding en route;
(iv) the oil content of the effluent is less than 100 parts 
per million; and
(v) the ship has in operation an oil discharge monitoring and 
control system, oily-water separating equipment, oil 
filtering system or other installation as required by 
Regulation 16 of this Annex.

2. In the case of a ship of less than 400 tons gross tonnage 
other than oil tanker whilst outside the special area, the 
Administration shall ensure that it is equipped as far as 
practicable and reasonable with installations to ensure the 
storage of oil residues on board and their discharge to 
reception facilities or into the sea in compliance with the 
requirements of paragraph (1) (b) of this Regulation.

3. Whenever visible traces of oil are observed on or below 
the surface of the water in the immediate vicinity of a ship 
or its wake, Governments of Parties to the Convention should, 
to the extent they are reasonably able to do so, promptly 
investigate the facts bearing on the issue of whether there 
has been a violation of the provisions of this Regulation or 
Regulation 10 of this Annex. The investigation should 
include, in particular, the wind and sea conditions, the 
track and speed of the ship, other possible sources of 
visible traces in the vicinity, and any relevant oil 
discharge records.

4. The provisions of paragraph (1) of this Regulation shall 
not apply to the discharge of clean or segregated ballast. 
The provisions of subparagraph (1)(b) of this Regulation 
shall not apply to the discharge of oily mixture which 
without dilution has an oil content not exceeding 15 parts 
per million.

5. No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.

6. The oil residues which cannot be discharged into the sea 
in compliance with paragraphs (1), (2) and (4) of this 
Regulation shall be retained on board or discharged to 
reception facilities.


Regulation 10

METHODS FOR THE PREVENTION OF OIL POLLUTION FROM SHIPS WHILE 
OPERATING IN SPECIAL AREAS

1. For the purposes of this Annex the special areas are the 
Mediterranean Sea area, the Baltic Sea area, the Black Sea 
area and the "Gulfs area" which are defined as follows:

a) The Mediterranean Sea area means the Mediterranean Sea 
proper including the gulfs and seas therein with the boundary 
between the Mediterranean and the Black Sea constituted by 
the 41 deg N parallel and bounded to the west by the Straits 
of Gibraltar at the meridian of 5 deg 36 min W.

b) The Baltic Sea area means the Baltic Sea proper with the 
Gulf of Bothnia, the Gulf of Finland and the entrance to the 
Baltic Sea bounded by the parallel of the Skaw in the 
Skagerrak at 57 deg 44.8 min N.

c) The Black Sea area means the Black Sea proper with the 
boundary between the Mediterranean and the Black Sea 
constituted by the parallel 41 deg N.

d) The Red Sea area means the Red Sea proper including the 
Gulfs of Suez and Aqaba bounded at the South by the rhumb 
line between Ras si Ane (12 deg 8.5 min N, 43 deg 19.6 min E) 
and Husn Murad (12 deg 40.4 min N, 43 deg 30.2 min E).

e) The Gulfs area means the sea area located north west of 
the rhumb line between Ras al Hadd (22 deg 30 min N, 59 deg 
48 min E) and RAs Al Fasteh (25 deg 04 min N, 61 deg 25 min 
E).

2. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or oily mixture from 
any oil tanker and any ship or 400 tons gross tonnage and 
above other than an oil tanker shall be prohibited, while in 
a special area.

b) Such ships while in a special area shall retain on board 
all oil drainage and sludge, dirty ballast and tank washing 
waters and discharge them only to reception facilities.

3. a) Subject to the provisions of Regulation 11 of this 
Annex, any discharge into the sea of oil or mixture from a 
ship of less than 400 tons gross tonnage, other than oil 
tanker, shall be prohibited while in a special area, except 
when the oil content of the effluent without dilution does 
not exceed 15 parts per million or alternatively when all of 
the following conditions are satisfied:

 (i) the ship is proceeding en route;

(ii) the oil content of the effluent is less than 100 parts 
per million; and

(iii) the discharge is made as far as practicable from the 
land, but in no case less than 12 nautical miles from the 
nearest land.

b) No discharge into the sea shall contain chemicals or other 
substances in quantities or concentrations which are 
hazardous to the marine environment or chemicals or other 
substances introduced for the purpose of circumventing the 
conditions of discharge specified in this Regulation.