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1. This Convention and its protocols shall be open for accession by the States and organizations referred to in article 25 as from the day following the date on which the Convention or the protocol concerned is closed for signature.
2. After entry into force of this Convention and of any protocol, any State or regional economic integration organization not referred to in article 25 may accede to the Convention and to any protocol subject to prior approval by three fourths of the Contracting Parties to the Convention or the protocol concerned, provided that any such regional economic integration organization exercises competence in fields covered by the Convention and the relevant protocol and has at least one member State, belonging to the wider Caribbean region, that is a party to the Convention and the relevant protocol.
3. In their instruments of accession, the organizations referred to in paragraphs 1 and 2 shall declare the extent of their competence with respect to the matters governed by the Convention and the relevant protocol. These organizations shall also inform the Depositary of any substantial modification in the extent of their competence.
4. Instruments of accession shall be deposited with the Depositary.