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


Summary of the "International Convention for the Prevention of Pollution of the Sea by Oil" 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.
Disclaimer: ENTRI data providers make every effort to ensure the accuracy, reliability, and completeness of the texts and other information included in this collection; however, neither CIESIN nor the ENTRI data providers verify or guarantee the accuracy, reliability, or completeness of the contents of ENTRI. If you encounter an error, please notify us by e-mail to entri@ciesin.org.


INTERNATIONAL CONVENTION FOR THE PREVENTION OF POLLUTION 
OF THE SEA BY OIL, 1954*

* The original text of the Convention, which was done by the 
International Conference on Pollution of the Sea by Oil in London 
on 12 May 1954, entered into force on 26 July 1958. The Convention 
was modified by Amendments adopted by the International Conference 
on Prevention of Pollution of the Sea by Oil, 1962; these 
Amendments entered into force on 18 May and 28 June 1967. The 
Convention was further modified by Amendments adopted by the sixth 
Assembly of the InterGovernmental Maritime Consultative 
Organization on 21 October 1969 (Resolution A. 175 (Vl)); these 
Amendments entered into force on 20 January 1978.

London, 12 May 1954


The Governments represented at the International Conference on 
Pollution of the Sea by Oil held in London from 26 April 1954 to 
12 May 1954.

Desiring to take action by common agreement to prevent pollution 
of the sea by oil discharged from ships, and considering that this 
end may best be achieved by the conclusion of a Convention,

Have accordingly appointed the undersigned plenipotentiaries, 
who, having communicated their full powers, found in good and due 
form, have agreed as follows:


Article I

1. For the purposes of the present Convention, the following 
expressions shall (unless the context otherwise requires) have the 
meanings hereby respectively assigned to them that is to say:
'The Bureau' has the meaning assigned to it by Article XXI;
'Discharge' in relation to oil or to oily mixture means any 
discharge or escape howsoever caused;
'Heavy diesel oil' means diesel oil, other than those distillates 
of which more than 50 per cent by volume distils at a temperature 
not exceeding 340 deg C when tested by A.S.T.M. Standard Method 
D.86/59;
'Instantaneous rate of discharge of oil content' means the rate 
of discharge of oil in litres per hour at any instant divided by 
the speed of the ship in knots at the same instant;
'Mile' means a nautical mile of 6,080 feet or 1,852 metres;
'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 the Geneva Convention 
on the Territorial Sea and the Contiguous Zone, 1958';
'Oil' means crude oil, fuel oil, heavy diesel oil and lubricating 
oil, and 'oily' shall be construed accordingly;
'Oily mixture' means a mixture with any oil content;
'Organization' means the Inter-Governmental Maritime Consultative 
Organization;
'Ship' means any sea-going vessel of any type whatsoever, 
including floating craft, whether self-propelled or towed by 
another vessel, making a sea voyage; and 'tanker' means a ship in 
which the greater part of the cargo space is constructed or 
adapted for the carriage of liquid cargoes in bulk and which is 
not, for the time being, carrying a
cargo other than oil in that part of the cargo space. 
2. For the purposes of the present Convention the territories of a 
Contracting Government means the territory of the country of which 
it is the Government and any other territory for the international 
relations of which it is responsible and to which the Convention 
shall have been extended under Article XVIII.


Article II

1. The present Convention shall apply to ships registered in any 
of the territories of a Contracting Government and to unregistered 
ships having the nationality of a Contracting Party, except:

a) tankers of under 150 tons gross tonnage and other ships of 
under 500 tons gross tonnage, provided that each Contracting 
Government will take the necessary steps, so far as is reasonable 
and practicable, to apply the requirements of the Convention to 
such ships also, having regard to their size, service and the type 
of fuel used for their propulsion;

b) ships for the time being engaged in the whaling industry when 
actually employed on whaling operations;

c) ships for the time being navigating the Great Lakes of North 
America and their connecting and tributary waters as far east as 
the lower exit of St. Lambert Lock at Montreal in the Province of 
Quebec, Canada;

d) naval ships and ships for the time being used as naval 
auxiliaries.

2. Each Contracting Government undertakes to adopt appropriate 
measures ensuring that requirements equivalent to those of the 
present Convention are, so far as is reasonable and practicable, 
applied to the ships referred to in subparagraph (d) of paragraph 
(1) of this Article.


Article III

Subject to the provisions of Articles IV and V:

a) the discharge from a ship to which the present Convention 
applies, other than a tanker, of oil or oily mixture shall be 
prohibited except when the following conditions are all satisfied:

     (i) the ship is proceeding en route;

     (ii) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per mile;

     (iii) the oil content of the discharge is less than 100 parts 
per 1,000,000 parts of the mixture.

     (iv) the discharge is made as far as practicable from land;

b) the discharge from a tanker to which the present Convention 
applies of oil or oily mixture shall be prohibited except when the 
following conditions are all satisfied:

     (i) the tanker is proceeding en route;

     (ii) the instantaneous rate of discharge of oil content does 
not exceed 60 litres per mile;

     (iii) the total quantity of oil discharged on a ballast 
voyage does not exceed 1/15,000 of the total cargo-carrying 
capacity;

     (iv) the tanker is more than 50 miles from the nearest land;

c) the provisions of sub-paragraph (b) of this Article shall not 
apply to:

     (i) the discharge of ballast from a cargo tank which, since 
the cargo was last carried therein, has been so cleaned that any 
effluent therefrom, if it were discharged from a stationary tanker 
into clean calm water on a clear day, would produce no visible 
traces of oil on the surface of the water; or

     (ii) the discharge of oil or oily mixture from machinery 
space bilges, which shall be governed by the provisions of sub-
paragraph (a) of this Article.


Article IV

Article III shall not apply to:

a) the discharge of oil or of oily mixture from a ship for the 
purpose of securing the safety of a ship, preventing damage to a 
ship or cargo, or saving life at sea;

b) the escape of oil or of oily mixture resulting from damage to a 
ship or unavoidable leakage, if all reasonable precautions have 
been taken after the occurrence of the damage or discovery of the 
leakage for the purpose of preventing or minimizing the escape.


Article V

Article III shall not apply to the discharge of oily mixture from 
the bilges of a ship during the period of twelve months following 
the date on which the present Convention comes into force for the 
relevant territory in accordance with paragraph (1) of Article II.


Article VI

1. Any contravention of Articles III and IX shall be an offence 
punishable under the law of the relevant territory in respect of 
the ship in accordance with paragraph (1) of Article II.

2. The penalties which may be imposed under the law of any of the 
territories of a Contracting Government in respect of the unlawful 
discharge from a ship of oil or oily mixture outside the 
territorial sea of that territory shall be adequate in severity to 
discourage any such unlawful discharge and shall not be less than 
the penalties which may be imposed under the law of that territory 
in respect of the same infringements within the territorial sea.

3. Each Contracting Government shall report to the Organization 
the penalties actually imposed for each infringement.


Article VII

1. As from a date twelve months after the present Convention comes 
into force for the relevant territory in respect of a ship in 
accordance with paragraph (1) of Article II, such a ship shall be 
required to be so fitted as to prevent, as far as reasonable and 
practicable, the escape of oil into bilges, unless effective means 
are provided to ensure that the oil in the bilges is not 
discharged in contravention of this Convention.

2. Carrying water ballast in oil fuel tanks shall be avoided if 
possible.


Article VIII

1. Each Contracting Government shall take all appropriate steps to 
promote the provision of facilities as follows:

a) according to the needs of ships using them, ports shall be 
provided with facilities adequate for the reception, without 
causing undue delay to ships of such residues and oily mixtures as 
would remain for disposal from ships other than tankers if the 
bulk of the water had been separated from the mixture;

b) oil loading terminals shall be provided with facilities, 
adequate for the reception of such residues and oily mixture as 
would similarly remain for disposal by tankers;

c) ship repair ports shall be provided with facilities adequate 
for the reception of such residues and oily mixtures as would 
similarly remain for disposal by all ships entering for repairs.

2. Each Contracting Government shall determine which are the ports 
and oil loading terminals in its territories suitable for the 
purposes of sub-paragraphs (a), (b) and (c) of paragraph (1) of 
this Article.

3. As regards paragraph (1) of this Article, each Contracting 
Government shall report to the Organization, for transmission to 
the Contracting Government concerned, all cases where the 
facilities are alleged to be inadequate.


Article IX

1. Of the ships to which the present Convention applies, every 
ship which uses oil fuel and every 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 the Annex to this 
Convention.

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 tankers:

     (i) loading of oil cargo;
     (ii) transfer of oil cargo during voyage; 
     (iii) discharge of oil cargo; 
     (iv) ballasting of cargo tanks;
     (v) cleaning of cargo tanks; 
     (vi) discharge of dirty ballast; 
     (vii) discharge of water from slop-tanks; 
     (viii) disposal of residues;
     (ix) discharge overboard of bilge water containing oil which 
has accumulated in machinery spaces whilst in port, and the 
routine discharge at sea of bilge water containing oil unless the 
latter has been entered in the appropriate log book;

b) for ships other than tankers:

     (i) ballasting or cleaning of bunker fuel tanks; 
     (ii) discharge of dirty ballast or cleaning water from tanks 
referred to under (i) of this subparagraph;
     (iii) disposal of residues;
     (iv) discharge overboard of bilge water containing oil which 
has accumulated in machinery spaces whilst in port, and the 
routine discharge at sea of bilge water containing oil unless the 
latter has been entered in the appropriate log book.

In the event of such discharge or escape of oil or oily 
mixture as is referred to in Article IV, a statement shall be made 
in the oil record book of the circumstances of, and the reason 
for, the discharge or escape.

3. Each operation described in paragraph (2) of this Article 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 page of the book shall be signed by the officer or 
officers in charge of the operations concerned and, when the ship 
is manned, by the master of the ship. The written entries in the 
oil record book shall be in an official language of the relevant 
territory in respect of the ship in accordance with paragraph (1) 
of Article II, or in English or French.

4. Oil record books 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. They shall be preserved for a period of two years after the 
last entry has been made.

5. The competent authorities of any of the territories of a 
Contracting Government may inspect on board any ship to which the 
present Convention applies, while within a port in that territory, 
the oil record book required to be carried in the ship in 
compliance with the provisions of this Article, and may make a 
true copy of an 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 purports to have 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. Any action by the 
competent authorities under this paragraph shall be taken as 
expeditiously as possible and the ship shall not be delayed.


Article X

1. Any Contracting Government may furnish to the Government of the 
relevant territory in respect of the ship in accordance with 
paragraph (1) of Article II particulars in writing of evidence 
that any provision of the present Convention has been contravened 
in respect of that ship, wheresoever the alleged contravention may 
have taken place. If it is practicable to do so, the competent 
authorities of the former Government shall notify the master of 
the ship of the alleged contravention.

2. Upon receiving such particulars, the Government so informed 
shall investigate the matter, and may request the other Government 
to furnish further or better particulars of the alleged 
contravention. If the Government so informed is satisfied that 
sufficient evidence is available in the form required by its law 
to enable proceedings against the owner or master of the ship to 
be taken in respect of the alleged contravention, it shall cause 
such proceedings to be taken as soon as possible. The Government 
shall promptly inform the Government whose official has reported 
the alleged contravention, as well as the Organization, of the 
action taken as a consequence of the information communicated.


Article XI

Nothing in the present Convention shall be construed as 
derogating from the powers of any Contracting Government to take 
measures within its jurisdiction in respect of any matter to which 
the Convention relates or as extending the jurisdiction of any 
Contracting Government.


Article XII

Each Contracting Government shall send to the Bureau and to the 
appropriate organ of the United Nations:

a) the text of laws, decrees, orders and regulations in force in 
its territories which give effect to the present Convention;

b) all official reports or summarises of official reports in so 
far as they show the results of the application of the provisions 
of the Convention, provided always that such reports or summaries 
are not, in the opinion of that Government, of a confidential 
nature.


Article XIII

Any dispute between Contracting Governments relating to the 
interpretation or application of the present Convention which 
cannot be settled by negotiation shall be referred at the request 
of either party to the International Court of Justice for decision 
unless the parties in dispute agree to submit it to arbitration.


Article XIV

1. The present Convention shall remain open for signature for 
three months from this day's date and shall thereafter remain open 
for acceptance.

2. Subject to Article XV, the Governments of States Members of the 
United Nations or of any of the Specialized Agencies or parties to 
the Statute of the International Court of Justice may become 
parties to the present Convention by:

a) signature without reservation as to acceptance;
b) signature subject to acceptance followed by acceptance; or 
c) acceptance.

3. Acceptance shall be effected by the deposit of an instrument of 
acceptance with the Bureau, which shall inform all Governments 
that have already signed or accepted the present Convention of 
each signature and deposit of an acceptance and of the date of 
such signature or deposit.


Article XV

1. The present Convention shall come into force twelve months 
after the date on which not less than ten Governments have become 
parties to the Convention, including five Governments of countries 
each with not less than 500,000 gross tons of tanker tonnage.

2. a) For each Government which signs the Convention without 
reservation as to acceptance or accepts the Convention before the 
date on which the Convention comes into force in accordance with 
paragraph (1) of this Article it shall come into force on that 
date. For each Government which accepts the Convention on or after 
that date, it shall come into force three months after the date of 
the deposit of that Government's acceptance.
b) The Bureau shall, as soon as possible, inform all Governments 
which have signed or accepted the Convention of the date on which 
it will come into force.


Article XVI

1. a) The present Convention may be amended by unanimous agreement 
between the Contracting Governments.
b) Upon request of any Contracting Government a proposed amendment 
shall be communicated by the Organization to all Contracting 
Governments for consideration and acceptance under this paragraph.

2. a) An amendment to the present Convention may be proposed to 
the Organization at any time by any Contracting Government, and 
such proposal if adopted by a two-thirds majority of the Assembly 
of the Organization upon recommendation adopted by a two-thirds 
majority of the Maritime Safety Committee of the Organization 
shall be communicated by the Organization to all Contracting 
Governments for their acceptance.
b) Any such recommendation by the Maritime Safety Committee shall 
be communicated by the Organization to all Contracting Governments 
for their consideration at least six months before it is 
considered by the Assembly.

3. a) A conference of Governments to consider amendments to the 
present Convention proposed by any Contracting Government shall at 
any time be convened by the Organization upon the request of one-
third of the Contracting Governments.
b) Every amendment adopted by such conference by a two-thirds 
majority of the Contracting Governments shall be communicated by 
the Organization to all Contracting Governments for their 
acceptance.

4. Any amendment communicated to Contracting Governments for their 
acceptance under paragraph (2) or (3) of this Article shall come 
into force for all Contracting Governments except those which 
before it comes into force make a declaration that they do not 
accept the amendment, twelve months after the date on which the 
amendment is accepted by two-thirds of the Contracting 
Governments.

5. The Assembly, by a two-thirds majority vote including two-
thirds of the Governments represented on the Maritime Safety 
Committee, and subject to the concurrence of two-thirds of the 
Contracting Governments to the present Convention, or a conference 
convened under paragraph (3) of this Article by a two-thirds 
majority vote, may determine at the time of its adoption that the 
amendment is of such an important nature that any Contracting 
Government which makes a declaration under paragraph (4) of this 
Article and which does not accept the amendment within a period of 
twelve months after the amendment comes into force, shall, upon 
the expiry of this period, cease to be a party to the present 
Convention.

6. The Organization shall inform all Contracting Governments of 
any amendments which come into force under this Article, together 
with the date on which such amendments shall come into force.

7. Any acceptance or declaration under this Article shall be made 
by a notification in writing to the Organization which shall 
notify all Contracting Governments of the receipt of the 
acceptance or declaration.


Article XVII

1. The present Convention may be denounced by any Contracting 
Government at any time after the expiration of a period of five 
years from the date on which the Convention comes into force for 
that Government.

2. Denunciation shall be effected by a notification in writing 
addressed to the Bureau which shall notify all the Contracting 
Governments of any denunciation received and of the date of its 
receipt.

3. A denunciation shall take effect twelve months, or such longer 
period as may be specified in the notification, after its receipt 
by the Bureau.


Article XVIII

1. a) The United Nations in cases where they are the administering 
authority for a territory or any Contracting Government 
responsible for the international relations of a territory shall 
as soon as possible consult with such territory in an endeavour to 
extend the present Convention to that territory and may at any 
time by notification in writing given to the Bureau declare that 
the Convention shall extend to such territory.
b) The present Convention shall from the date of the receipt of 
the notification or from such other date as may be specified in 
the notification extend to the territory named therin.

2. a) The United Nations in cases where they are the administering 
authority for a territory or any Contracting Government which has 
made a declaration under paragraph (1) of this Article, at any 
time after the expiry of a period of five years from the date on 
which the present Convention has been so extended to any 
territory, may by a notification in writing given to the Bureau 
after consultation with such territory declare that the Convention 
shall cease to extend to any such territory named in the 
notification.
b) The present Convention shall cease to extend to any territory 
mentioned in such notification one year, or such longer period as 
may be specified therein, after the date of receipt of the 
notification by the Bureau.

3. The Bureau shall inform all the Contracting Governments of the 
extension of the present Convention to any territory under 
paragraph (1) of this Article, and of the termination of any such 
extension under the provisions of paragraph (2) stating in each 
case the date from which the Convention has been or will cease to 
be so extended.


Article XIX

1. In case of war or other hostilities, a Contracting Government 
which considers that it is affected. whether as a belligerent or 
as a neutral, may suspend the operation of the whole or any part 
of the present Convention in respect of all or any of its 
territories. The suspending Government shall immediately give 
notice of any such suspension to the Bureau.

2. The suspending Government may at any time terminate such 
suspension and shall in any event terminate it as soon as it 
ceases to be justified under paragraph (1) of this Article. Notice 
of such termination shall be given immediately to the Bureau by 
the Government concerned.

3. The Bureau shall notify all the Contracting Governments of any 
suspension or termination of suspension under this Article.


Article XX

As soon as the present Convention comes into force it shall be 
registered by the Bureau with the Secretary-General of the United 
Nations.


Article XXI

The duties of the Bureau shall be carried out by the Government of 
the United Kingdom of Great Britain and Northern Ireland* unless 
and until the Inter-Governmental Maritime Consultative 
Organization comes into being and takes over the duties assigned 
to it under the Convention signed at Geneva on the 6 March 1948, 
and thereafter the duties of the Bureau shall be carried out by 
the said Organization.

* Transferred to IMCO 15 June 1959 in accordance with Assembly 
Resolution A. 8(1).

In Witness Whereof the undersigned plenipotentiaries have signed 
the present Convention**

** Signatures omitted.

Done in London this twelfth day of May, 1954, in English and 
French, both texts being equally authoritative, in a single copy, 
which shall be deposited with the Bureau and of which the Bureau 
shall transmit certified copies to all signatory and Contracting 
Governments.

ANNEX

FORM OF OIL RECORD BOOK
I.—FOR TANKERS

Name of ship ..................................................

Total cargo carrying capacity of ship in cubic metres 
.........................................


a) Loading of oil cargo

     1. Date and place of loading

     2. Types of oil loaded

     3. Identity of tank(s) loaded


b) Transfer of oil cargo during voyage

     4. Date of transfer

     5. Identity of tank(s)             i     From
                                       ii     To

     6. Was (were) tank(s) in 5 (i) emptied?


c) Discharge of oil cargo

     7. Date and place of discharge

     8. Identity of tank(s) discharged

     9. Was (were) tank(s) emptied?

d) Ballasting of cargo tanks

     10. Identity of tank(s) ballasted

     11. Date and position of ship at start of ballasting


e) Cleaning of cargo tanks

     12. Identity of tank(s) cleaned

     13. Date and duration of cleaning 

     14. Methods of cleaning*

* Hand hosing, machine washing or chemical cleaning. Where 
chemically cleaned, the chemical concerned and the amount used 
should be stated.

 
f) Discharge of dirty ballast

     15. Identity of tank(s)

     16. Date and position of ship at start of discharge at sea

     17. Date and position of ship at finish of discharge at sea

     18. Ship's speed(s) during discharge

     19. Quantity discharged to sea

     20. Quantity of polluted water transferred to slop tank(s) 
(identify slop tanks(s))

     21. Date and port of discharge into shore reception 
facilities (if applicable)


g) Discharge of water from slop tanks

     22. Identity of slop tank(s)

     23. Time of settling from last entry of residues, or

     24. Time of settling from last discharge

     25. Date, time and position of ship at start of discharge

     26. Sounding of total contents at start of discharge

     27. Sounding of interface at start of discharge

     28. Bulk quantity discharged and rate of discharge

     29. Final quantity discharged and rate of discharge

     30. Date, time and position of ship at end of discharge

     31. Ship's speed(s) during discharge

     32. Sounding of interface at end of discharge


h) Disposal of residues

     33. Identity of tank(s)

     34. Quantity disposed from each tank

     35. Method of disposal of residue: 
          (a) Reception facilities 
          (b) Mixed with cargo 
          (c) Transferred to another (other) tank(s) (identify          
tank(s)
          (d) Other method

     36. Date and port of disposal of residue


i) Discharge overboard of bilge water containing oil which has 
accumulated in machinery spaces (including pump rooms) whilst in 
port*

* The routine discharge at sea of bilge water containing oil from 
machinery spaces including pump room bilges need not be entered in 
the oil record book but, if not, it must be entered in the 
appropriate log book, stating whether or not the discharge was 
made through a separator. Where the pump starts automatically and 
discharges through a separator at all times it will be sufficient 
to enter each day, "Automatic discharge from bilges through 
separator."

     37. Port

     38. Duration of stay

     39. Quantity disposed

     40. Date and place of disposal

     41. Method of disposal (state whether a separator was used)


j) Accidental or other exceptional discharges of oil

     42. Date and time of occurrence

     43. Place or position of ship at time of occurrence

     44. Approximate quantity and type of oil

     45. Circumstances of discharge or escape and general remarks



...............................Signature of officer or officers 
                               in charge of operation concerned

................................Signature of Master



II — FOR SHIPS OTHER THAN TANKERS


Name of Ship  ..................................................


a) Ballasting or cleaning of bunker fuel tanks

     1. Identity of tank(s) ballasted

     2. Whether cleaned since they last contained oil and, if not, 
type of oil previously carried

     3. Date and position of ship at start of cleaning

     4. Date and position of ship at start of ballasting


b) Discharge of dirty ballast or cleaning water from tanks 
referred to under (a)

     5. Identity of tank(s)

     6. Date and position of ships at start of cleaning

     7. Date and position of ship at finish of discharge

     8. Ship's speed(s) during discharge

     9. Method of discharge (state whether separator used)

     10. Quantity discharged


c) Disposal of residues

     11. Quantity of residue retained on board

     12. Methods of disposal of residue: 
          (a) reception facilities 
          (b) mixed with next bunkering 
          (c) transferred to another (other) tank

     13. Date and port of disposal of residue


d) Discharge overboard of bilge water containing oil which has 
accumulated in machinery spaces whilst in port*

* The routine discharge at sea of bilge water containing oil from 
machinery spaces need not be entered in the oil record book but, 
if not, it must be entered in the appropriate log book, stating 
whether or not the discharge was made through a separator. Where 
the pump starts automatically and discharges through a separator 
at all times it will be sufficient to enter each day, "Automatic 
discharge from bilges through separator."

      14. Port

      15. Duration of stay

     16. Quantity disposed

     17. Date and place of disposal

     18. Method of disposal (state whether separator was used)


e) Accidental or other exceptional discharges of oil

     19. Date and time of occurrence

     20. Place or position of ship at time of occurrence

     21. Approximate quantity and type of oil

     22. Circumstances of discharge or escape and general remarks



............................... Signature of Officer or Officers
                                in charge of operations concerned


................................Signature of Master



AMENDMENTS TO THE INTERNATIONAL CONVENTION FOR THE 
PREVENTION OF POLLUTION OF THE SEA BY OIL, 1954, 
CONCERNING THE PROTECTION OF THE GREAT BARRIER REEF


SUPPLEMENT I

The Seventh IMCO Assembly adopted on 12 October 1971, by 
Resolution A.232 (VII), and on 15 October 1971, by Resolution 
A.246 (VII), the following amendments to the International 
Convention for the Prevention of Pollution of the Sea by Oil, 
1954. In accordance with Article XVI (4) of the Convention, the 
amendments will come into force twelve months after the date on 
which they are accepted by two-thirds of the Contracting 
Governments.


(Resolution A.232 (VII) adopted on 12 October 1971)


Article I

The existing text of the definition of "Nearest Land" in Article 
I (as amended in 1969) is replaced by the following:

"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 the Geneva Convention 
on the Territorial Sea and the Contiguous Zone, 1958, except that, 
for the purposes of this 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 south, 
longitude 142 deg 08 min east to a point in latitude 10 deg 35 min 
south, longitude 141 deg 55 min east:

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 
30 min east

thence to a point latitude 13 deg 00 min south, longitude 144 deg 
00 min east

thence to a point latitude 15 deg 00 min south, longitude 146 deg 
00 min east

thence to a point latitude 18 deg 00 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 
min south, longitude 153 deg 15 min east.


Article III

The existing text of sub-paragraph (iv) of paragraph (a) of 
Article Ill (as amended in 1969) is replaced by the following:

(iv) the discharge is made as far as practicable from the nearest 
land.


AMENDMENTS TO THE INTERNATIONAL CONVENTION FOR THE 
PREVENTION OF POLLUTION OF THE SEA BY OIL, 1954 CONCERNING 
TANK ARRANGEMENTS AND LIMITATIONS OF TANK SIZE

(Resolution A.246 (Vll) adopted on 15 October 1971)

The Assembly,

Noting Article 16 (i) of the Convention on the Inter-Governmental 
Maritime Consultative Organization concerning the functions of the 
Assembly,

   Being conscious of the responsibility of the Organization for 
taking effective measures for the prevention and control of 
pollution of the marine environment which may arise from maritime 
activities,

Realizing that notwithstanding the adoption by the Organization 
of various measures for preventing collisions and strandings of 
ships, it is not possible to eliminate entirely accidents which 
may lead to release of oil, but desiring to minimize ensuing 
damage to the environment,

Recognizing that construction of oil tankers of large size 
without accompanying control of size or internal arrangement of 
cargo tanks leads to the possibility, in the event of a single 
accident, of serious environmental pollution,

Having examined the Recommendations relating to tank 
arrangements and to the limitation of tank size prepared by the 
Maritime Safety Committee at its twenty-third session.

Considering that the universal implementation of such 
requirements can best be achieved by amending the International 
Convention for the Prevention of Pollution of the Sea by Oil, 
1954,

Noting that Article XVI of the International Convention for the 
Prevention of Pollution of the Sea by Oil 1954 provides for 
procedures of amendment involving participation by the 
Organization,

  Adopts the following amendments to the Articles and Annexes to 
that Convention, the texts of which are attached to this 
Resolution:

a) the addition of a new Article VIbis, and 

b) the addition of a new Annex C,

Requests the Secretary-General of the Organization, in conformity 
with sub-paragraph (2) (a) of Article XVI to communicate for 
consideration and acceptance, certified copies of this Resolution 
and its Annexes, to all Contracting Governments to the 
International Convention for the Prevention of Pollution of the 
Sea by Oil, 1954, together with copies to all Members of the 
Organization,

Invites all governments concerned to accept the amendments at the 
earliest possible date, and

  Determines in accordance with paragraph (5) of Article XVI that 
these amendments are of such an important nature that any 
Contracting Government which makes a declaration under paragraph 
(4) of Article XVI and which does not accept the amendments within 
a period of 12 months after the amendments come into force, shall, 
upon the expiry of this period, cease to be a Party to the present 
Convention.


ANNEX 1

Add new Article VIbis as follows:

Article VIbis

1. Every tanker to which the present Convention applies and for 
which the building contract is placed on or after the date of 
coming into force of this Article shall be constructed in 
accordance with the provisions of Annex C. In addition, every 
tanker to which the present Convention applies and for which the 
building contract is placed, or in the absence of a building 
contract the keel of which is laid or which is at a similar stage 
of construction, before the date of coming into force of this 
Article shall be required, within two years after that date, to 
comply with the provisions of Annex C, where 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 1972, 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 June 1972.

2. A tanker required under paragraph (1) of this Article to be 
constructed in accordance with Annex C and so constructed shall 
carry on board a certificate issued or authorized by the 
responsible Contracting Government attesting such compliance. A 
tanker which under paragraph (l) of this Article is not required 
to be constructed in accordance with Annex C shall carry on board 
a certificate to that effect issued or authorized by the 
responsible Contracting Government, or if the tanker does comply 
with Annex C although not required to do so, it may carry on board 
a certificate issued or authorized by the responsible Contracting 
Government attesting such compliance. A Contracting Government 
shall not permit such tankers under its flag to trade unless the 
appropriate certificate has been issued.

3. Certificates issued under the authority of a Contracting 
Government shall be accepted by the other Contracting Governments 
for all purposes covered by the present Convention. They shall be 
regarded by the other Contracting Governments as having the same 
force as certificates issued by them.

4. If a Contracting Government has clear grounds for believing 
that a tanker required under paragraph (1) of this Article to be 
constructed in accordance with Annex C entering ports in its 
territory or using off-shore terminals under its control does not 
in fact comply with Annex C, such Contracting Government may 
request consultation with the Government with which the tanker is 
registered. If, after such consultation or otherwise, the 
Contracting Government is satisfied that the tanker does not 
comply with Annex C, such Contracting Government may for this 
reason deny such a tanker access to ports in its territorial 
waters or to off-shore terminals under its control until such time 
as the Contracting Government is satisfied that the tanker does 
comply.


Add new Annex C as follows:


ANNEX C*

*  where these Amendments enter into force, the Annex (Form of Oil 
Record Book) will become Annex A and this Annex will become Annex 
B

REQUIREMENTS RELATING TO TANK ARRANGEMENTS AND TO THE 
LIMITATION OF TANK SIZE 

1. Assumed extent of damage

In the following paragraphs three dimensions of the extent of 
damage of a parallelepiped due to both collision and stranding are 
assumed. In the case of stranding, two conditions are set forth to 
be applied individually to the stated portions of the ship. These 
values represent the maximum assumed damage in such accidents and 
are to be used to determine by trial at all conceivable locations 
the worst combination of compartments which would be breached by 
such an accident.

1.1 Collision

Longitudinal extent (lc)           l/3 x I x 2/3    or 14.5 
metres, whichever is less


Transverse extent (tc)              B/5  or 11.5 metres, 
whichever is less
inboard from the ship's side at 
right angles to the centreline 
at the level of the load line


Vertical extent (vc)                from the baseline upwards                           
without limit


1.2 Stranding

                   For O.3L from                        Any other
                   the forward                          part of
                   perpendicular                        the ship
                   of the ship

Longitudinal extent (1s)  L/10                  5 metres


Transverse extent (ts) B/6  or 10.0 metres,     5 metres
                       whichever is less

Vertical extent (vs)     B/15 or 6 metres, whichever is less, 
from the base line      for any part of the ship

where: L, B in metres and perpendicular are as defined in 
Regulation 3 of the International Convention on Load Lines, 1966.

2. Hypothetical oil outflow from tanks assumed to be breached as a 
result of the accident

The hypothetical oil outflow in the case of collision (Oc) and 
stranding (Os) shall be calculated by the following formulae with 
respect to compartments breached by each assumed location of 
damage as defined in Section 1.

2.1 Collision
Oc  = sigmaWi + 
sigmaKiCi.............................................(1)

2.2 Stranding
Os  =  1/3(sigmaZiWi + sigma ZiCi)   .................(2)

where:

Wi = volume of a wing tank in cubic metres breached by the damage 
assumed in Section l; Wi for a clean ballast tank may be taken 
equal to zero,

C = volume of a centre tank in cubic metres breached by the damage 
assumed in Section l; Ci for a clean 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.

hi = minimum depth of the bottom in metres under consideration; 
where no double bottom is fitted, shall be taken equal to zero,

wing tank = any tank adjacent to the side shell plating,

centre tank = any tank inboard a longitudinal bulkhead.

2.3 Special requirements

2.3.1 If a void space or clean water ballast tank of a length less 
than lc as defined in 1.1 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 clean ballast tank 
under consideration.

2.3.2 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 extend 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 
stranding damage shall be included in formula (2) 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 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 
connection to the tank served to prevent oil outflow in the event 
of damage of the piping during stranding. Such piping shall be 
installed as high from the bottom shell as possible.

2.3.3. In the case where stranding damage simultaneously involves 
four centre tanks, the value of Os may be calculated according to 
the formula

Os = 1/4(sigmaZiWi + sigmaZiCi) ........................(3)

2.3.4 An Administration may credit as reducing oil outflow in case 
of stranding, an installed cargo transfer system having an 
emergency high suction in each cargo oil tank, capable of 
transferring from a breaching 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 (3). The pipes for such 
suction shall be installed at least at a height not less than the 
vertical extent of the stranding damage vs.

The Administration shall supply the Organization with the 
information concerning the arrangements accepted by it, for 
circulation to other governments.

3. Limitations of size of cargo oil tanks

3.1 Limitation of hypothetical oil outflow

The hypothetical oil outflow Oc or Os calculated in accordance 
with the formulae in Section 2 shall not exceed 30,000 cubic 
metres or 400 square root of DW, whichever is the greater but 
subject to a maximum of 40,000 cubic metres, where DW = deadweight 
of the ship in metric tons.

3.2 Limitation of volume of single rank

The volume of a wing tank shall not exceed seventy-five per cent 
of the limits of hypothetical oil outflow referred to in 3.1. The 
volume of a centre tank shall not exceed 50,000 cubic metres. 

3.3 Limitation of tank length
    The length of each 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/B is equal to or greater than 1/5:
0.2L
(2) if bi/B is less than 1/5:

where no centreline longitudinal bulkhead is provided:

(0.5 bi/B + 0.1)L

where a centreline longitudinal bulkhead is provided:

(0.25 bi/B + 0.15) L