CONVENTION ON THE TRANSBOUNDARY EFFECTS OF  
INDUSTRIAL ACCIDENTS 

(Helsinki, 17 March 1992) 

Preamble 

The Parties to this Convention, 

Mindful of the special importance, in the interest of  
present and future generations, of protecting human  
beings and the environment against the effects of  
industrial accidents, Recognizing the importance and  
urgency of preventing serious adverse effects of  
industrial accidents on human beings and the  
environment, and of promoting all measures that  
stimulate the rational, economic and efficient use of  
preventive, preparedness and response measures to enable  
environmentally sound and sustainable economic  
development, 

Taking into account the fact that the effects of industrial  
accidents may make themselves felt across borders, and  
require cooperation among States, 

Affirming the need to promote active international  
cooperation among the States concerned before, during, and  
after an accident, to enhance appropriate policies and to  
reinforce and coordinate action at all appropriate levels  
for promoting the prevention of, preparedness for and  
response to the transboundary effects of industrial  
accidents, 

Noting the importance and usefulness of bilateral and  
multilateral arrangements for the prevention of,  
preparedness for and response to the effects of industrial  
accidents, 

Conscious of the role played in this respect by the United  
Nations Economic Commission for Europe (ECE) and recalling,  
inter alia, the ECE Code of Conduct on Accidental Pollution  
of Transboundary Inland Waters and the Convention on  
Environmental Impact Assessment in a Transboundary Context, 

Having regard to the relevant provisions of the Final Act of  
the Conference on Security and Cooperation in Europe (CSCE),  
the Concluding Document of the Vienna Meeting of  
Representatives of the Participating States of the CSCE, and  
the outcome of the Sofia Meeting on the Protection of the  
Environment of the CSCE, as well as to pertinent activities  
and mechanisms in the United Nations Environment Programme  
(UNEP), in particular the APELL programme, in the  
International Labour Organisation (ILO), in particular the  
Code of Practice on the Prevention of Major Industrial  
Accidents, and in other relevant international organizations, 

Considering the pertinent provisions of the Declaration of  
the United Nations Conference on the Human Environment, and  
in particular principle 2l, according to which States have,  
in accordance with the Charter of the United Nations and the  
principles of international law, the sovereign right to  
exploit their own resources pursuant to their own  
environmental policies, and the responsibility to ensure that  
activities within their jurisdiction or control do not cause  
damage to the environment of other States or of areas beyond  
the limits of national jurisdiction, 

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

Underlining the principles of international law and custom,  
in particular the principles of good-neighbourliness,  
reciprocity, non-discrimination and good faith, 

Have agreed as follows: 

Article 1 

Definitions 

For the purposes of this Convention, 

(a) "Industrial accident" means an event resulting from an  
uncontrolled development in the course of any activity  
involving hazardous substances either: 

(i) In an installation, for example during manufacture, use,  
storage, handling, or disposal; or 

(ii) During transportation in so far as it is covered by  
paragraph 2 (d) of Article 2; 

(b) "Hazardous activity" means any activity in which one or  
more hazardous substances are present or may be present in  
quantities at or in excess of the threshold quantities  
listed in Annex I hereto, and which is capable of causing  
transboundary effects; 

(c) "Effects" means any direct or indirect, immediate or  
delayed adverse consequences caused by an industrial  
accident on, inter alia: 

(i) Human beings, flora and fauna; 

(ii) Soil, water, air and landscape; 

(iii) The interaction between the factors in (i) and (ii); 

(iv) Material assets and cultural heritage, including  
historical monuments; 

(d) "Transboundary effects" means serious effects within the  
jurisdiction of a Party as a result of an industrial accident  
occurring within the jurisdiction of another Party; 

(e) "Operator" means any natural or legal person, including  
public authorities, in charge of an activity, e.g.  
supervising, planning to carry out or carrying out an  
activity; 

(f) "Party" means, unless the text otherwise indicates, a  
Contracting Party to this Convention; 

(g) "Party of origin" means any Party or Parties under whose  
jurisdiction an industrial accident occurs or is capable of  
occurring; (h) "Affected Party" means any Party or Parties  
affected or capable of being affected by transboundary effects  
of an industrial accident; 

(i) "Parties concerned" means any Party of origin and any  
affected Party; 

(j) "The public" means one or more natural or legal persons. 

Article 2 

Scope 

1. This Convention shall apply to the prevention of,  
preparedness for and response to industrial accidents  
capable of causing transboundary effects, including the  
effects of such accidents caused by natural disasters,  
and to international cooperation concerning mutual  
assistance, research and development, exchange of  
information and exchange of technology in the area of  
prevention of, preparedness for and response to  
industrial accidents. 

2. This Convention shall not apply to: 

(a) Nuclear accidents or radiological emergencies; 

(b) Accidents at military installations; 

(c) Dam failures, with the exception of the effects of  
industrial accidents caused by such failures; 

(d) Land-based transport accidents with the exception  
of: 

(i) Emergency response to such accidents; 

(ii) Transportation on the site of the hazardous  
activity; 

(e) Accidental release of genetically modified  
organisms; 

(f) Accidents caused by activities in the marine  
environment, including seabed exploration or  
exploitation; 

(g) Spills of oil or other harmful substances at sea. 

Article 3 

General provisions 

1. The Parties shall, taking into account efforts  
already made at national and international levels, take  
appropriate measures and cooperate within the framework  
of this Convention, to protect human beings and the  
environment against industrial accidents by preventing  
such accidents as far as possible, by reducing their  
frequency and severity and by mitigating their effects. To  
this end, preventive, preparedness and response measures,  
including restoration measures, shall be applied. 

2. The Parties shall, by means of exchange of information,  
consultation and other cooperative measures and without  
undue delay, develop and implement policies and strategies  
for reducing the risks of industrial accidents and  
improving preventive, preparedness and response measures,  
including restoration measures, taking into account, in  
order to avoid unnecessary duplication, efforts already  
made at national and international levels. 

3. The Parties shall ensure that the operator is obliged to  
take all measures necessary for the safe performance of the  
hazardous activity and for the prevention of industrial  
accidents. 

4. To implement the provisions of this Convention, the  
Parties shall take appropriate legislative, regulatory,  
administrative and financial measures for the prevention  
of, preparedness for and response to industrial accidents. 

5. The provisions of this Convention shall not prejudice  
any obligations of the Parties under international law with  
regard to industrial accidents and hazardous activities. 

Article 4 

Identification, consultation and advice 

1. For the purpose of undertaking preventive measures and  
setting up preparedness measures, the Party of origin shall  
take measures, as appropriate, to identify hazardous  
activities within its jurisdiction and to ensure that  
affected Parties are notified of any such proposed or  
existing activity. 

2. Parties concerned shall, at the initiative of any such  
Party, enter into discussions on the identification of those  
hazardous activities that are, reasonably, capable of causing  
transboundary effects. If the Parties concerned do not agree  
on whether an activity is such a hazardous activity, any such  
Party may, unless the Parties concerned agree on another  
method of resolving the question, submit that question to an  
inquiry commission in accordance with the provisions of Annex  
II hereto for advice. 

3. The Parties shall, with respect to proposed or existing  
hazardous activities, apply the procedures set out in Annex  
III hereto. 

4. When a hazardous activity is subject to an environ- 
mental impact assessment in accordance with the Convention  
on Environmental Impact Assessment in a Transboundary  
Context and that assessment includes an evaluation of the  
transboundary effects of industrial accidents from the  
hazardous activity which is performed in conformity with  
the terms of this Convention, the final decision taken for  
the purposes of the Convention on Environmental Impact  
Assessment in a Transboundary Context shall fulfil the  
relevant requirements of this Convention. 

Article 5 

Voluntary Extension 

Parties concerned should, at the initiative of any of  
them, enter into discussions on whether to treat an  
activity not covered by Annex I as a hazardous activity.  
Upon mutual agreement, they may use an advisory mechanism  
of their choice, or an inquiry commission in accordance  
with Annex II, to advise them. Where the Parties concerned  
so agree, this Convention, or any part thereof, shall  
apply to the activity in question as if it were a  
hazardous activity. 


Article 6 

Prevention 

1. The Parties shall take appropriate measures for the  
prevention of industrial accidents, including measures to  
induce action by operators to reduce the risk of industrial  
accidents. Such measures may include, but are not limited to  
those referred to in Annex IV hereto. 

2. With regard to any hazardous activity, the Party of  
origin shall require the operator to demonstrate the safe  
performance of the hazardous activity by the provision of  
information such as basic details of the process, including  
but not limited to, analysis and evaluation as detailed in  
Annex V hereto. 

Article 7 

Decision-making on Siting 

Within the framework of its legal system, the Party of  
origin shall, with the objective of minimizing the risk to  
the population and the environment of all affected Parties,  
seek the establishment of policies on the siting of new  
hazardous activities and on significant modifications to  
existing hazardous activities. Within the framework of  
their legal systems, the affected Parties shall seek the  
establishment of policies on significant developments in  
areas which could be affected by transboundary effects of  
an industrial accident arising out of a hazardous activity  
so as to minimize the risks involved. In elaborating and  
establishing these policies, the Parties should consider  
the matters set out in Annex V, paragraph 2, subparagraphs  
(1) to (8), and Annex VI hereto. 

Article 8 

Emergency Preparedness 

1. The Parties shall take appropriate measures to establish  
and maintain adequate emergency preparedness to respond to  
industrial accidents. The Parties shall ensure that  
preparedness measures are taken to mitigate transboundary  
effects of such accidents, on-site duties being undertaken  
by operators. These measures may include, but are not  
limited to those referred to in Annex VII hereto. In  
particular, the Parties concerned shall inform each other  
of their contingency plans. 

2. The Party of origin shall ensure for hazardous  
activities the preparation and implementation of on-site  
contingency plans, including suitable measures for response  
and other measures to prevent and minimize transboundary  
effects. The Party of origin shall provide to the other  
Parties concerned the elements it has for the elaboration  
of contingency plans. 

3. Each Party shall ensure for hazardous activities the  
preparation and implementation of off-site contingency  
plans covering measures to be taken within its territory  
to prevent and minimize transboundary effects. In  
preparing these plans, account shall be taken of the  
conclusions of analysis and evaluation, in particular the  
matters set out in Annex V, paragraph 2, subparagraphs (1)  
to (5). Parties concerned shall endeavour to make such  
plans compatible. Where appropriate, joint off-site  
contingency plans shall be drawn up in order to facilitate  
the adoption of adequate response measures. 

4. Contingency plans should be reviewed regularly, or when  
circumstances so require, taking into account the  
experience gained in dealing with actual emergencies. 

Article 9 

Information to, and Participation of the Public 

1. The Parties shall ensure that adequate information is  
given to the public in the areas capable of being affected  
by an industrial accident arising out of a hazardous  
activity. This information shall be transmitted through  
such channels as the Parties deem appropriate, shall  
include the elements contained in Annex VIII hereto and  
should take into account matters set out in Annex V,  
paragraph 2, subparagraphs (1) to (4) and (9). 

2. The Party of origin shall, in accordance with the  
provisions of this Convention and whenever possible and  
appropriate, give the public in the areas capable of being  
affected an opportunity to participate in relevant procedures  
with the aim of making known its views and concerns on  
prevention and preparedness measures, and shall  
ensure that the opportunity given to the public of the  
affected Party is equivalent to that given to the public of  
the Party of origin. 
3. The Parties shall, in accordance with their legal systems  
and, if desired, on a reciprocal basis provide natural or  
legal persons who are being or are capable of being adversely  
affected by the transboundary effects of an industrial  
accident in the territory of a Party, with access to, and  
treatment in the relevant administrative and judicial  
proceedings, including the possibilities of starting a legal  
action and appealing a decision affecting their rights,  
equivalent to those available to persons within their own  
jurisdiction. 

Article 10 

Industrial Accident Notification Systems 

1. The Parties shall, with the aim of obtaining and  
transmitting industrial accident notifications containing  
information needed to counteract transboundary effects,  
provide for the establishment and operation of compatible  
and efficient industrial accident notification systems at  
appropriate levels. 

2. In the event of an industrial accident, or imminent  
threat thereof, which causes or is capable of causing  
transboundary effects, the Party of origin shall ensure  
that affected Parties are, without delay, notified at  
appropriate levels through the industrial accident  
notification systems. Such notification shall include the  
elements contained in Annex IX hereto. 

3. The Parties concerned shall ensure that, in the event of  
an industrial accident or imminent threat thereof, the  
contingency plans prepared in accordance with Article 8 are  
activated as soon as possible and to the extent appropriate  
to the circumstances. 

Article 11 

Response 

1. The Parties shall ensure that, in the event of an  
industrial accident, or imminent threat thereof, adequate  
response measures are taken, as soon as possible and using  
the most efficient practices, to contain and minimize  
effects. 

2. In the event of an industrial accident, or imminent threat  
thereof, which causes or is capable of causing transboundary  
effects, the Parties concerned shall ensure that the effects  
are assessed, where appropriate, jointly for the purpose of  
taking adequate response measures. The Parties concerned  
shall endeavour to coordinate their response measures. 

Article 12 

Mutual Assistance 

1. If a Party needs assistance in the event of an industrial  
accident, it may ask for assistance from other Parties,  
indicating the scope and type of assistance required. A Party  
to whom a request for assistance is directed shall promptly  
decide and inform the requesting Party whether it is in a  
position to render the assistance required and indicate the  
scope and terms of the assistance that might be rendered. 

2. The Parties concerned shall cooperate to facilitate the  
prompt provision of assistance agreed to under paragraph 1  
of this Article, including, where appropriate, action to  
minimize the consequences and effects of the industrial  
accident, and to provide general assistance. Where Parties  
do not have bilateral or multilateral agreements which  
cover their arrangements for providing mutual assistance,  
the assistance shall be rendered in accordance with Annex  
X hereto, unless the Parties agree otherwise. 

Article 13 

Responsibility and Liability 

The Parties shall support appropriate international efforts to  
elaborate rules, criteria and procedures in the field of  
responsibility and liability. 

Article 14 

Research and Development 

The Parties shall, as appropriate, initiate and cooperate  
in the conduct of research into, and in the development  
of methods and technologies for the prevention of,  
preparedness for and response to industrial accidents.  
For these purposes, the Parties shall encourage and  
actively promote scientific and technological  
cooperation, including research into less hazardous  
processes aimed at limiting accident hazards and  
preventing and limiting the consequences of industrial  
accidents. 

Article 15 

Exchange of Information 

The Parties shall, at the multilateral or bilateral level,  
exchange reasonably obtainable information, including the  
elements contained in Annex XI hereto. 

Article 16 

Exchange of Technology 

1. The Parties shall, consistent with their laws,  
regulations and practices, facilitate the exchange of  
technology for the prevention of, preparedness for and  
response to the effects of industrial accidents,  
particularly through the promotion of: 

(a) Exchange of available technology on various financial  
bases;  

(b) Direct industrial contacts and cooperation; 

(c) Exchange of information and experience; 

(d) Provision of technical assistance. 

2. In promoting the activities specified in paragraph 1,  
subparagraphs (a) to (d) of this Article, the Parties  
shall create favourable conditions by facilitating  
contacts and cooperation among appropriate organizations  
and individuals in both the private and the public sectors  
that are capable of providing technology, design and  
engineering services, equipment or finance. 

Article 17 

Competent Authorities and Points of Contact 

1. Each Party shall designate or establish one or more  
competent authorities for the purposes of this Convention. 

2. Without prejudice to other arrangements at the bilateral  
or multilateral level, each Party shall designate or  
establish one point of contact for the purpose of industrial  
accident notifications pursuant to Article 10, and one point  
of contact for the purpose of mutual assistance pursuant to  
Article 12. These points of contact should preferably be the  
same. 

3. Each Party shall, within three months of the date of  
entry into force of this Convention for that Party, inform  
the other Parties, through the secretariat referred to in  
Article 20, which body or bodies it has designated as its  
point(s) of contact and as its competent authority or  
authorities. 

4. Each Party shall, within one month of the date of  
decision, inform the other Parties, through the secretariat,  
of any changes regarding the designation(s) it has made  
under paragraph 3 of this Article. 

5. Each Party shall keep its point of contact and industrial  
accident notification systems pursuant to Article 10  
operational at all times. 6. Each Party shall keep its point  
of contact and the authorities responsible for making and  
receiving requests for, and accepting offers of assistance  
pursuant to Article 12 operational at all times. 

Article 18 

Conference of the Parties 

1. The representatives of the Parties shall constitute the  
Conference of the Parties of this Convention and hold their  
meetings on a regular basis. The first meeting of the  
Conference of the Parties shall be convened not later than  
one year after the date of the entry into force of this  
Convention. Thereafter, a meeting of the Conference of the  
Parties shall be held at least once a year or at the  
written request of any Party, provided that, within six  
months of the request being communicated to them by the  
secretariat, it is supported by at least one third of the  
Parties.  

2. The Conference of the Parties shall: 

(a) Review the implementation of this Convention; 

(b) Carry out advisory functions aimed at strengthening the  
ability of Parties to prevent, prepare for and respond to  
the transboundary effects of industrial accidents, and at  
facilitating the provision of technical assistance and  
advice at the request of Parties faced with industrial  
accidents; 

(c) Establish, as appropriate, working groups and other  
appropriate mechanisms to consider matters related to the  
implementation and development of this Convention and, to this  
end, to prepare appropriate studies and other documentation  
and submit recommendations for consideration by the Conference  
of the Parties; 

(d) Fulfil such other functions as may be appropriate under  
the provisions of this Convention; 

(e) At its first meeting, consider and, by consensus, adopt  
rules of procedure for its meetings. 

3. The Conference of the Parties, in discharging its  
functions, shall, when it deems appropriate, also cooperate  
with other relevant international organizations. 

4. The Conference of the Parties shall, at its first meeting,  
establish a programme of work, in particular with regard to  
the items contained in Annex XII hereto. The Conference of  
the Parties shall also decide on the method of work,  
including the use of national centres and cooperation with  
relevant international organizations and the establishment of  
a system with a view to facilitating the implementation of  
this Convention, in particular for mutual assistance in the  
event of an industrial accident, and building upon pertinent  
existing activities within relevant international  
organizations. As part of the programme of work, the  
Conference of the Parties shall review existing national,  
regional and international centres, and other bodies and  
programmes aimed at coordinating information and efforts in  
the prevention of, preparedness for and response to  
industrial accidents, with a view to determining what  
additional international institutions or centres may be  
needed to carry out the tasks listed in Annex XII. 

5. The Conference of the Parties shall, at its first  
meeting, commence consideration of procedures to create more  
favourable conditions for the exchange of technology for the  
prevention of, preparedness for and response to the effects  
of industrial accidents. 

6. The Conference of the Parties shall adopt guidelines and  
criteria to facilitate the identification of hazardous  
activities for the purposes of this Convention. 

Article 19 

Right to Vote 

1. Except as provided for in paragraph 2 of this Article,  
each Party to this Convention shall have one vote. 

2. Regional economic integration organizations as defined in  
Article 27 shall, in matters within their competence,  
exercise their right to vote with a number of votes equal to  
the number of their member States which are Parties to this  
Convention. Such organizations shall not exercise their  
right to vote if their member States exercise theirs, and  
vice versa. 

Article 20 

Secretariat 

The Executive Secretary of the Economic Commission for  
Europe shall carry out the following secretariat functions: 

(a) Convene and prepare meetings of the Parties; 

(b) Transmit to the Parties reports and other information  
received in accordance with the provisions of this  
Convention; 

(c) Such other functions as may be determined by the  
Parties. 


Article 21 

Settlement of Disputes 


1. If a dispute arises between two or more Parties about  
the interpretation or application of this Convention, they  
shall seek a solution by negotiation or by any other  
method of dispute settlement acceptable to the parties to  
the dispute. 

2. When signing, ratifying, accepting, approving or  
acceding to this Convention, or at any time thereafter, a  
Party may declare in writing to the Depositary that, for a  
dispute not resolved in accordance with paragraph 1 of this  
Article, it accepts one or both of the following means of  
dispute settlement as compulsory in relation to any Party  
accepting the same obligation: 

(a) Submission of the dispute to the International Court of  
Justice; (b) Arbitration in accordance with the procedure  
set out in Annex XIII hereto. 

3. If the parties to the dispute have accepted both means  
of dispute settlement referred to in paragraph 2 of this  
Article, the dispute may be submitted only to the  
International Court of Justice, unless the parties to the  
dispute agree otherwise. 

Article 22 

Limitations on the Supply of Information 

1. The provisions of this Convention shall not affect the  
rights or the obligations of Parties in accordance with  
their national laws, regulations, administrative provisions  
or accepted legal practices and applicable international  
regulations to protect information related to personal  
data, industrial and commercial secrecy, including  
intellectual property, or national security. 

2. If a Party nevertheless decides to supply such  
protected information to another Party, the Party  
receiving such protected information shall respect the  
confidentiality of the information received and the  
conditions under which it is supplied, and shall only  
use that information for the purposes for which it was  
supplied. 

Article 23 

Implementation 

The Parties shall report periodically on the implementation  
of this Convention. 

Article 24 

Bilateral and Multilateral Agreements 

1. The Parties may, in order to implement their obligations  
under this Convention, continue existing or enter into new  
bilateral or multilateral agreements or other arrangements. 

2. The provisions of this Convention shall not affect the  
right of Parties to take, by bilateral or multilateral  
agreement where appropriate, more stringent measures than  
those required by this Convention. 

Article 25 

Status of Annexes 

The Annexes to this Convention form an integral part of the  
Convention. 

Article 26 

Amendments to the Convention 

1. Any Party may propose amendments to this Convention. 

2. The text of any proposed amendment to this Convention  
shall be submitted in writing, to the Executive Secretary  
of the Economic Commission for Europe, who shall circulate  
it to all Parties. The Conference of the Parties shall  
discuss proposed amendments at its next annual meeting,  
provided that such proposals have been circulated to the  
Parties by the Executive Secretary of the Economic  
Commission for Europe at least ninety days in advance. 

3. For amendments to this Convention - other than those to  
Annex I, for which the procedure is described in paragraph  
4 of this Article: (a) Amendments shall be adopted by  
consensus of the Parties present at the meeting and shall  
be submitted by the Depositary to all Parties for  
ratification, acceptance or approval; 

(b) Instruments of ratification, acceptance or approval of  
amendments shall be deposited with the Depositary.  
Amendments adopted in accordance with this Article shall  
enter into force for Parties that have accepted them on the  
ninetieth day following the day of receipt by the  
Depositary of the sixteenth instrument of ratification,  
acceptance or approval; 

(c) Thereafter, amendments shall enter into force for any  
other Party on the ninetieth day after that Party deposits  
its instruments of ratification, acceptance or approval of  
the amendments. 

4. For amendments to Annex I: 

(a) The Parties shall make every effort to reach agreement  
by consensus. If all efforts at consensus have been  
exhausted and no agreement reached, the amendments shall,  
as a last resort, be adopted by a nine-tenths majority vote  
of the Parties present and voting at the meeting. If  
adopted by the Conference of the Parties, the amendments  
shall be communicated to the Parties and recommended for  
approval; 

(b) On the expiry of twelve months from the date of their  
communication by the Executive Secretary of the Economic  
Commission for Europe, the amendments to Annex I shall become  
effective for those Parties to this Convention which have not  
submitted a notification in accordance with the provisions of  
paragraph 4 (c) of this Article, provided that at least  
sixteen Parties have not submitted such a notification; 

(c) Any Party that is unable to approve an amendment to  
Annex I of this Convention shall so notify the Executive  
Secretary of the Economic Commission for Europe in  
writing within twelve months from the date of the  
communication of the adoption. The Executive Secretary  
shall without delay notify all Parties of any such  
notification received. A Party may at any time  
substitute an acceptance for its previous notification  
and the amendment to Annex I shall thereupon enter into  
force for that Party. 

(d) For the purpose of this paragraph "Parties present and  
voting" means Parties present and casting an affirmative or  
negative vote. 

Article 27 

Signature 

This Convention shall be open for signature at Helsinki  
from 17 to 18 March 1992 inclusive, and thereafter at  
United Nations Headquarters in New York until 18  
September 1992, by States members of the Economic  
Commission for Europe, as well as States having  
consultative status with the Economic Commission for  
Europe pursuant to paragraph 8 of Economic and Social  
Council resolution 36 (IV) of 28 March 1947, and by  
regional economic integration organizations constituted  
by sovereign States members of the Economic Commission  
for Europe to which their member States have transferred  
competence in respect of matters governed by this  
Convention, including the competence to enter into  
treaties in respect of these matters. 

Article 28 

Depositary 

The Secretary-General of the United Nations shall act as  
the Depositary of this Convention. 

Article 29 

Ratification, Acceptance, Approval and Accession 

1. This Convention shall be subject to ratification,  
acceptance or approval by the signatory States and regional  
economic integration organizations referred to in Article  
27. 

2. This Convention shall be open for accession by the  
States and organizations referred to in Article 27. 

3. Any organization referred to in Article 27 which becomes  
Party to this Convention without any of its member States  
being a Party shall be bound by all the obligations under  
this Convention. In the case of such organizations, one or  
more of whose member States is a Party to this Convention,  
the organization and its member States shall decide on their  
respective responsibilities for the performance of their  
obligations under this Convention. In such cases, the  
organization and the member States shall not be entitled to  
exercise rights under this Convention concurrently. 

4. In their instruments of ratification, acceptance,  
approval or accession, the regional economic integration  
organizations referred to in Article 27 shall declare the  
extent of their competence with respect to the matters  
governed by this Convention. These organizations shall also  
infom the Depositary of any substantial modification to the  
extent of their competence. 

Article 30 

Entry into Force 

1. This Convention shall enter into force on the ninetieth  
day after the date of deposit of the sixteenth instrument  
of ratification, acceptance, approval or accession. 

2. For the purposes of paragraph 1 of this Article, any  
instrument deposited by an organization referred to in  
Article 27 shall not be counted as additional to those  
deposited by States members of such an organization. 

3. For each State or organization referred to in Article 27  
which ratifies, accepts or approves this Convention or  
accedes thereto after the deposit of the sixteenth  
instrument of ratification, acceptance, approval or  
accession, this Convention shall enter into force on the  
ninetieth day after the date of deposit by such State or  
organization of its instrument of ratification, acceptance,  
approval or accession. 

Article 31 

Withdrawal 

1. At any time after three years from the date on which  
this Convention has come into force with respect to a  
Party, that Party may withdraw from this Convention by  
giving written notification to the Depositary. Any such  
withdrawal shall take effect on the ninetieth day after the  
date of the receipt  of the notification by the Depositary. 

2. Any such withdrawal shall not affect the application of  
Article 4 to an activity in respect of which a notification  
has been made pursuant to Article 4, paragraph 1, or a  
request for discussions has been made pursuant to Article  
4, paragraph 2. 

Article 32 

Authentic Texts 

The original of this Convention, of which the English,  
French and Russian texts are equally authentic, shall be  
deposited with the Secretary-General of the United Nations. 

Annex I - Hazardous Substances for the Purposes of  
Defining Hazardous Activities 

omissis 

Annex II - Inquiry Commission Procedure Pursuant to  
Articles 4 and 5 

omissis 

Annex III - Procedures Pursuant to Article 4 

omissis 

Annex IV - Preventive Measures Pursuant to Article 6 

omissis 

Annex V - Analysis and Evaluation 

omissis 

Annex VI - Decision-Making on Siting Pursuant to Article 7 

omissis 

Annex VII - Emergency Preparedness Measures Pursuant to  
Article 8 

omissis 

Annex VIII - Information to the Public Pursuant to Article  
9 
omissis 

Annex IX - Industrial Accident Notification Systems  
Pursuant to Article 10 

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Annex X - Mutual Assistance Pursuant to Article 12 

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Annex XI - Exchange of Information Pursuant to Article 15 

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Annex XII - Tasks for Mutual Assistance Pursuant to Article  
18, Paragraph 4 

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Annex XIII - Arbitration 

omissis.