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1. Any Contracting Party may propose one or more amendments to this Convention. The text of any proposed amendment shall be transmitted to the Secretary-General of the United Nations who shall circulate it to all Contracting Parties.
2. Any proposed amendment circulated in accordance with the preceding paragraph shall be deemed to be accepted if no Contracting Party expresses an objection within a period of six months following the date of circulation of the proposed amendment by the Secretary-General. Regional economic integration oganizations which are Contracting Parties to this Convention, for the matters within their competence, shall exercise their right to express an objection. In such case the Member States of said organizations, which are Contracting Parties to this Convention, shall not be entitled to exercise individually such right.
3. The Secretary-General shall notify as soon as possible all Contracting Parties whether an objection to the proposed amendment has been expressed, and if no such objection has been expressed, the amendment shall enter into force for all Contracting Parties three months after the expiration of the period of six months referred to in the preceding paragraph.