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1. A Party to this Convention may, by written communication addressed to the Director-General, propose amendments to this Convention. The Director-General shall circulate such communication to all Parties. If, within six months from the date of dispatch of the communication, no less than one half of the Parties reply favourably to the request, the Director-General shall present such proposal to the next session of the Conference of Parties for discussion and possible adoption.
2. Amendments shall be adopted by a two-thirds majority of Parties present and voting.
3. Once adopted, amendments to this Convention shall be submitted to the Parties for ratification, acceptance, approval or accession.
4. For Parties which have ratified, accepted, approved or acceded to them, amendments to this Convention shall enter into force three months after the deposit of the instruments referred to in paragraph 3 of this Article by two-thirds of the Parties. Thereafter, for each Party that ratifies, accepts, approves or accedes to an amendment, the said amendment shall enter into force three months after the date of deposit by that Party of its instrument of ratification, acceptance, approval or accession.
5. The procedure set out in paragraphs 3 and 4 shall not apply to amendments to Article 23 concerning the number of Members of the Intergovernmental Committee. These amendments shall enter into force at the time they are adopted.
6. A State or a regional economic integration organization referred to in Article 27 which becomes a Party to this Convention after the entry into force of amendments in conformity with paragraph 4 of this Article shall, failing an expression of different intention, be considered to be:
a) Party to this Convention as so amended; and
b) a Party to the unamended Convention in relation to any Party not bound by the amendments.