INTERNATIONAL CONVENTION ON OIL POLLUTION  
PREPAREDNESS, RESPONSE AND COOPERATION 

(London, 30 November 1990) 

The Parties to the present Convention, 

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

Recognizing the serious threat posed to the marine  
environment by oil pollution incidents involving ships,  
offshore units, sea ports and oil handling facilities, 

Mindful of the importance of precautionary measures and  
prevention in avoiding oil pollution in the first  
instance, and the need for strict application of  
existing international instruments dealing with maritime  
safety and marine pollution prevention, particularly the  
International Convention for the Safety of Life at Sea,  
1974, as amended, and the International Convention for  
the Prevention of Pollution from Ships, 1973, as  
modified by the Protocol of 1978 relating thereto, as  
amended, and also the speedy development of enhanced  
standards for the design, operation and maintenance of  
ships carrying oil, and of offshore units, 

Mindful also that, in the event of an oil pollution  
incident, prompt and effective action is essential in  
order to minimize the damage which may result from such  
an incident, 

Emphasizing the importance of effective preparation for  
combating oil pollution incidents and the important role  
which the oil and shipping industries have in this  
regard, 

Recognizing further the importance of mutual assistance  
and international cooperation relating to matters  
including the exchange of information respecting the  
capabilities of States to respond to oil pollution  
incidents, the preparation of oil pollution contingency  
plans, the exchange of reports of incidents of  
significance which may affect the marine environment or  
the coastline and related interests of States, and  
research and development respecting means of combating  
oil pollution in the marine environment, 

Taking account of the "polluter pays" principle as a  
general principle of international environmental law, 

Taking account also of the importance of international  
instruments on liability and compensation for oil  
pollution damage, including the 1969 International  
Convention on Civil Liability for Oil Pollution Damage  
(CLC); and the 1971 International Convention on the  
Establishment of an International Fund for Compensation  
for Oil Pollution Damage (FUND); and the compelling need  
for early entry into force of the 1984 Protocols to the  
CLC and FUND Conventions, Taking account further of the  
importance of bilateral and multilateral agreements and  
arrangements including regional conventions and  
agreements, 

Bearing in mind the relevant provisions of the United  
Nations Convention on the Law of the Sea, in particular  
of its part XII, Being aware of the need to promote  
international cooperation and to enhance existing  
national, regional and global capabilities concerning  
oil pollution preparedness and response, taking into  
account the special needs of the developing countries  
and particularly small island States, 

Considering that these objectives may best be achieved  
by the conclusion of an International Convention on Oil  
Pollution Preparedness, Response and Cooperation, 

Have agreed as follows: 

Article 1 

General provisions 

(1) Parties undertake, individually or jointly, to take  
all appropriate measures in accordance with the  
provisions of this Convention and the Annex thereto to  
prepare for and respond to an oil pollution incident. 

(2) The Annex to this Convention shall constitute an  
integral part of the Convention and a reference to this  
Convention constitutes at the same time a reference to  
the Annex. 

(3) This 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 practicable,  
with this Convention. 

Article 2 

Definitions 

For the purposes of this Convention: 

(1) Oil means petroleum in any form including crude oil,  
fuel oil, sludge, oil refuse and refined products. 

(2) Oil pollution incident means an occurrence or series  
of occurrences having the same origin, which results or  
may result in a discharge of oil and which poses or may  
pose a threat to the marine environment, or to the  
coastline or related interests of one or more States,  
and which requires emergency action or other immediate  
response. 

(3) Ship means a vessel of any type whatsoever operating  
in the marine environment and includes hydrofoil boats,  
air-cushion vehicles, submersibles, and floating craft  
of any type. 

(4) Offshore unit means any fixed or floating offshore  
installation or structure engaged in gas or oil  
exploration, exploitation or production activities, or  
loading or unloading of oil. 

(5) Sea ports and oil handling facilities means those  
facilities which present a risk of an oil pollution  
incident and includes, inter alia, sea ports oil  
terminals, pipelines and other oil handling facilities. 

(6) Organization means the International Maritime  
Organization. 

(7) Secretary-General means the Secretary-General of the  
Organization. 

Article 3 

Oil pollution emergency plans 

(1) (a) Each Party shall require that ships entitled to  
fly its flag have on board a shipboard oil pollution  
emergency plan as required by and in accordance with the  
provisions adopted by the Organization for this purpose. 

(b) A ship required to have on board an oil pollution  
emergency plan in accordance with subparagraph (a) is  
subject, while in a port or at an offshore terminal  
under the jurisdiction of a Party to inspection by  
officers duly authorized by that Party, in accordance  
with the practices provided for in existing inter- 
national agreements or its national legislation. 

(2) Each Party shall require that operators of offshore  
units under its jurisdiction have oil pollution  
emergency plans, which are coordinated with the national  
system established in accordance with article 6 and  
approved in accordance with procedures established by  
the competent national authority. 

(3) Each Party shall require that authorities or  
operators in charge of such sea ports and oil handling  
facilities under its jurisdiction as it deems  
appropriate have oil pollution emergency plans or  
similar arrangements which are coordinated with the  
national system established in accordance with article 6  
and approved in accordance with procedures established  
by the competent national authority. 

Article 4 

Oil pollution reporting procedures 

(1) Each Party shall: 

(a) require masters or other persons having charge of  
ships flying its flag and persons having charge of  
offshore units under its jurisdiction to report without  
delay any event on their ship or offshore unit involving  
a discharge or probable discharge of oil:  

(i) in the case of a ship, to the nearest coastal State; 

(ii) in the case of an offshore unit, to the coastal  
State to whose jurisdiction the unit is subject; 

(b) require masters or other persons having charge of  
ships flying its flag and persons having charge of  
offshore units under its jurisdiction to report without  
delay any observed event at sea involving a discharge of  
oil or the presence of oil: 

(i) in the case of a ship, to the nearest coastal State; 

(ii) in the case of an offshore unit, to the coastal  
State to whose jurisdiction the unit is subject; 

(c) require persons having charge of sea ports and oil  
handling facilities under its jurisdiction to report  
without delay any event involving a discharge or  
probable discharge of oil or the presence of oil to the  
competent national authority; 

(d) instruct its maritime inspection vessels or aircraft  
and other appropriate services or officials to report  
without delay any observed event at sea or at a sea port  
or oil handling facility involving a discharge of oil or  
the presence of oil to the competent national authority  
or, as the case may be, to the nearest coastal State; 

(e) request the pilots of civil aircraft to report  
without delay any observed event at sea involving a  
discharge of oil or the presence of oil to the nearest  
coastal State. 

(2) Reports under paragraph (1)(a)(i) shall be made in  
accordance with the requirements developed by the  
Organization and based on the guidelines and general  
principles adopted by the Organization. Reports under  
paragraph (1)(a)(ii), (b), (c) and (d) shall be made in  
accordance with the guidelines and general principles  
adopted by the Organization to the extent applicable. 

Article 5 

Action on receiving an oil pollution report 

(1) Whenever a Party receives a report referred to in  
article 4 or pollution information provided by other  
sources, it shall: 

(a) assess the event to determine whether it is an oil  
pollution incident; 

(b) assess the nature, extent and possible consequences  
of the oil pollution incident; and 

(c) then, without delay, inform all States whose  
interests are affected or likely to be affected by such  
oil pollution incident, together with 

(i) details of its assessments and any action it has  
taken, or intends to take, to deal with the incident,  
and 

(ii) further information as appropriate, until the  
action taken to respond to the incident has been  
concluded or until joint action has been decided by such  
States. 

(2) When the severity of such oil pollution incident so  
justifies, the Party should provide the Organization  
directly or, as appropriate, through the relevant  
regional organization or arrangements with the  
information referred to in paragraph (1)(b) and (c). 

(3) When the severity of such oil pollution incident so  
justifies, other States affected by it are urged to  
inform the Organization directly or, as appropriate,  
through the relevant regional organizations or  
arrangements of their assessment of the extent of the  
threat to their interests and any action taken or  
intended.  

(4) Parties should use, in so far as practicable, the  
oil pollution reporting system developed by the  
Organization when exchanging information and  
communicating with other States and with the  
Organization. 

Article 6 

National and regional systems for preparedness and  
response 

(1) Each Party shall establish a national system for  
responding promptly and effectively to oil pollution  
incidents. This system shall include as a minimum: 

(a) the designation of: 

(i) the competent national authority or authorities with  
responsibility for oil pollution preparedness and  
response;  

(ii) the national operational contact point or points,  
which shall be responsible for the receipt and  
transmission of oil pollution reports as referred to in  
article 4; and 

(iii) an authority which is entitled to act on behalf of  
the State to request assistance or to decide to render  
the assistance requested;  

(b) a national contingency plan for preparedness and  
response which includes the organizational relationship  
of the various bodies involved, whether public or  
private, taking into account guidelines developed by the  
Organization. 

(2) In addition, each Party, within its capabilities  
either individually or through bilateral or multilateral  
cooperation and, as appropriate, in cooperation with the  
oil and shipping industries, port authorities and other  
relevant entities, shall establish:  

(a) a minimum level of pre-positioned oil spill  
combating equipment, commensurate with the risk  
involved, and programmes for its use;  

(b) a programme of exercises for oil pollution response  
organizations and training of relevant personnel; 

(c) detailed plans and communication capabilities for  
responding to an oil pollution incident. Such  
capabilities should be continuously available; and 
(d) a mechanism or arrangement to coordinate the  
response to an oil pollution incident with, if  
appropriate, the capabilities to mobilize the necessary  
resources. 

(3) Each Party shall ensure that current information is  
provided to the Organization, directly or through the  
relevant regional organization or arrangements,  
concerning: 

(a) the location, telecommunication data and, if  
applicable, areas of responsibility of authorities and  
entities referred to in paragraph (1)(a); 

(b) information concerning pollution response equipment  
and expertise in disciplines related to oil pollution  
response and marine salvage which may be made available  
to other States, upon request; and 

(c) its national contingency plan. 

Article 7 

International co-operation in pollution response 

(1) Parties agree that, subject to their capabilities  
and the availability of relevant resources, they will  
co-operate and provide advisory services, technical  
support and equipment for the purpose of responding to  
an oil pollution incident, when the severity of such  
incident so justifies, upon the request of any Party  
affected or likely to be affected. The financing of the  
costs for such assistance shall be based on the  
provisions set out in the Annex to this Convention. 

(2) A Party which has requested assistance may ask the  
Organization to assist in identifying sources of  
provisional financing of the costs referred to in  
paragraph (1). 

(3) In accordance with applicable international  
agreements, each Party shall take necessary legal or  
administrative measures to facilitate: 

(a) the arrival and utilization in and departure from  
its territory of ships, aircraft and other modes of  
transport engaged in responding to an oil pollution  
incident or transporting personnel, cargoes,  
materials and equipment required to deal with such an  
incident; and  

(b) the expeditious movement into, through, and out of  
its territory of personnel, cargoes, materials and  
equipment referred to in subparagraph (a). 

Article 8 

Research and development 

(1) Parties agree to co-operate directly or, as  
appropriate, through the Organization or relevant  
regional organizations or arrangements in the promotion  
and exchange of results of research and development  
programmes relating to the enhancement of the state-of- 
the-art of oil pollution preparedness and response,  
including technologies and techniques for surveillance,  
containment, recovery, dispersion, clean-up and  
otherwise minimizing or mitigating the effects of oil  
pollution, and for restoration. 

(2) To this end, Parties undertake to establish directly  
or, as appropriate, through the Organization or relevant  
regional organizations or arrangements, the necessary  
links between Parties' research institutions. 

(3) Parties agree to co-operate directly or through the  
Organization or relevant regional organizations or  
arrangements to promote, as appropriate, the holding on  
a regular basis of international symposia on relevant  
subjects, including technological advances in oil  
pollution combating techniques and equipment. 

(4) Parties agree to encourage, through the Organization  
or other competent international organizations, the  
development of standards for compatible oil pollution  
combating techniques and equipment. 

Article 9 

Technical co-operation 

(1) Parties undertake directly or through the  
Organization and other international bodies, as  
appropriate, in respect of oil pollution preparedness  
and response, to provide support for those Parties which  
request technical assistance: 

(a) to train personnel; 

(b) to ensure the availability of relevant technology,  
equipment and facilities; 

(c) to facilitate other measures and arrangements to  
prepare for and respond to oil pollution incidents; and 

(d) to initiate joint research and development  
programmes. 

(2) Parties undertake to co-operate actively, subject to  
their national laws, regulations and policies, in the  
transfer of technology in respect of oil pollution  
preparedness and response. 

Article 10 

Promotion of bilateral and multilateral co-operation in  
preparedness and response 

Parties shall endeavour to conclude bilateral or  
multilateral agreements for oil pollution preparedness  
and response. Copies of such agreements shall be  
communicated to the Organization which should make them  
available on request to Parties. 

Article 11 

Relation to other conventions and international  
agreements. Nothing in this Convention shall be  
construed as altering the rights or obligations of any  
Party under any other convention or international  
agreement. 

Article 12 

Institutional arrangements 

(1) Parties designate the Organization, subject to its  
agreement and the availability of adequate resources to  
sustain the activity, to perform the following functions  
and activities: 

(a) information services: 

(i) to receive, collate and disseminate on request the  
information provided by Parties (see, for example,  
articles 5 (2) and (3), 6 (3) and 10) and relevant  
information provided by other sources; and (ii) to  
provide assistance in identifying sources of provisional  
financing of costs (see, for example, article 7 (2)); 

(b) education and training: 

(i) to promote training in the field of oil pollution  
preparedness and response (see, for example, article 9);  
and 

(ii) to promote the holding of international symposia  
(see, for example, article 8 (3)); 

(c) technical services: 

(i) to facilitate co-operation in research and  
development (see, for example, articles 8 (1), (2) and  
(4) and 9(1)(d)); 

(ii) to provide advice to States establishing national  
or regional response capabilities; and 

(iii) to analyse the information provided by Parties  
(see, for example, articles 5 (2) and (3), 6 (3) and 8  
(1)) and relevant information provided by other sources  
and provide advice or information to States; 

(d) technical assistance: 

(i) to facilitate the provision of technical assistance  
to States establishing national or regional response  
capabilities; and 

(ii) to facilitate the provision of technical assistance  
and advice, upon the request of States faced with major  
oil pollution incidents. (2) In carrying out the  
activities specified in this article, the Organization  
shall endeavour to strengthen the ability of States  
individually or through regional arrangements to prepare  
for and combat oil pollution incidents, drawing upon the  
experience of States, regional agreements and industry  
arrangements and paying particular attention to the  
needs of developing countries. 

(3) The provisions of this article shall be implemented  
in accordance with a programme developed and kept under  
review by the Organization. 

Article 13 

Evaluation of the Convention 

Parties shall evaluate within the Organization the  
effectiveness of the Convention in the light of its  
objectives, particularly with respect to the principles  
underlying co-operation and assistance. 


Article 14 

Amendments 

(1) This Convention may be amended by one of the  
procedures specified in the following paragraphs. 

(2) Amendment after consideration by the Organization: 

(a) Any amendment proposed by a Party to the Convention  
shall be submitted to the Organization and circulated by  
the 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 the Marine Environment Protection  
Committee of 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 Marine Environment Protection  
Committee. 

(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 subparagraph (d),  
amendments shall be communicated by the Secretary- 
General to all Parties to the Convention for acceptance. 

(f) (i) An amendment to an article or the Annex of the  
Convention shall be deemed to have been accepted on the  
date on which it is accepted by two thirds of the  
Parties. 

(ii) An amendment to an appendix shall be deemed to have  
been accepted at the end of a period to be determined by  
the Marine Environment Protection Committee at the time  
of its adoption, which period shall not be less than ten  
months, unless within that period an objection is  
communicated to the Secretary-General by not less than  
one third of the Parties. 

(g) (i) An amendment to an article or the Annex of the  
Convention accepted in conformity with subparagraph    
(f)(i) shall enter into force six months after the date  
on which it is deemed to have been accepted with respect  
to the Parties which have notified the Secretary-General  
that they have accepted it. 

(ii) An amendment to an appendix accepted in conformity  
with subparagraph (f) (ii) shall enter into force six  
months after the date on which it is deemed to have been  
accepted with respect to all Parties with the exception  
of those which, before that date, have objected to it. A  
Party may at any time withdraw a previously communicated  
objection by submitting a notification to that effect to  
the Secretary-General. 

(3) Amendment by a Conference: 

(a) Upon the request of a Party, concurred with by at  
least one third of the Parties, the Secretary-General  
shall convene a Conference of Parties to the Convention  
to consider amendments to the Convention. 

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

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

(4) The adoption and entry into force of an amendment  
constituting an addition of an Annex or an appendix  
shall be subject to the procedure applicable to an  
amendment to the Annex. 

(5) Any Party which has not accepted an amendment to an  
article or the Annex under paragraph (2)(f)(i) or an  
amendment constituting an addition of an Annex or an  
appendix under paragraph (4) or has communicated an  
objection to an amendment to an appendix under paragraph  
(2)(f)(ii) shall be treated as a non-Party only for the  
purpose of the application of such amendment. Such  
treatment shall terminate upon the submission of a  
notification of acceptance under paragraph (2)(f)(i) or  
withdrawal of the objection under paragraph (2)(g)(ii). 

(6) The Secretary-General shall inform all Parties of  
any amendment which enters into force under this  
article, together with the date on which the amendment  
enters into force. 

(7) Any notification of acceptance of, objection to, or  
withdrawal of objection to, an amendment under this  
article shall be communicated in writing to the  
Secretary-General who shall inform Parties of such  
notification and the date of its receipt. 

(8) An appendix to the Convention shall contain only  
provisions of a technical nature. 

Article 15 

Signature, ratification, acceptance, approval and  
accession 

(1) This Convention shall remain open for signature at  
the Headquarters of the Organization from 30 November  
1990 until 29 November 1991 and shall thereafter remain  
open for accession. Any State may become Party to this  
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. 


Article 16 

Entry into force 

(1) This Convention shall enter into force twelve months  
after the date on which not less than fifteen States  
have either signed it without reservation as to  
ratification, acceptance or approval or have deposited  
the requisite instruments of ratification, acceptance,  
approval or accession in accordance with article 15. 

(2) For States which have deposited an instrument of  
ratification, acceptance, approval or accession in  
respect of this Convention after the requirements for  
entry into force thereof have been met but prior to the  
date of entry into force, the ratification, acceptance,  
approval or accession shall take effect on the date of  
entry into force of this Convention or three months  
after the date of deposit of the instrument, whichever  
is the later date. 

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

(4) After the date on which an amendment to this  
Convention is deemed to have been accepted under article  
14, any instrument of ratification, acceptance, approval  
or accession deposited shall apply to this Convention as  
amended. 

Article 17 

Denunciation 

(1) This Convention may be denounced by any Party at any  
time after the expiry of five years from the date on  
which this Convention enters into force for that Party. 

(2) Denunciation shall be effected by notification in  
writing to the Secretary-General. 

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

Article 18 

Depositary 

(1) This Convention shall be deposited with the  
Secretary-General.  

(2) The Secretary-General shall: 

(a) inform all States which have signed this Convention  
or acceded thereto of: 

(i) each new signature or deposit of an instrument of  
ratification, acceptance, approval or accession,  
together with the date thereof;  

(ii) the date of entry into force of this Convention;  
and 

(iii) the deposit of any instrument of denunciation of  
this Convention together with the date on which it was  
received and the date on which the denunciation takes  
effect; 

(b) transmit certified true copies of this Convention to  
the Governments of all States which have signed this  
Convention or acceded thereto. 

(3) As soon as this Convention enters into force, a  
certified true copy thereof shall be transmitted by the  
depositary 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 19 

Languages 

This Convention is established in a single original in  
the Arabic, Chinese, English, French, Russian and  
Spanish languages, each text being equally authentic. 

In witness whereof the undersigned, being duly  
authorized by their respective Governments for that  
purpose, have signed this Convention. 


Done at London this thirtieth day of November one  
thousand nine hundred and ninety. 

Annex - Reimbursement of Costs of Assistance 

omissis.