Article 31. Adoption and Amendment of Annexes

1. Any additional annex to the Convention and any amendment to an annex shall be proposed and adopted in accordance with the procedure for amendment of the Convention set forth in article 30, provided that, in adopting an additional regional implementation annex or amendment to any regional implementation annex, the majority provided for in that article shall include a two-thirds majority vote of the Parties of the region concerned present and voting. The adoption or amendment of an annex shall be communicated by the Depositary to all Parties.

2. An annex, other than an additional regional implementation annex, or an amendment to an annex, other than an amendment to any regional implementation annex, that has been adopted in accordance with paragraph 1, shall enter into force for all Parties to the Convention six months after the date of communication by the Depositary to such Parties of the adoption of such annex or amendment, except for those Parties that have notified the Depositary in writing within that period of their non- acceptance of such annex or amendment. Such annex or amendment shall enter into force for Parties which withdraw their notification of non-acceptance on the ninetieth day after the date on which withdrawal of such notification has been received by the Depositary.

3. An additional regional implementation annex or amendment to any regional implementation annex that has been adopted in accordance with paragraph 1, shall enter into force for all Parties to the Convention six months after the date of the communication by the Depositary to such Parties of the adoption of such annex or amendment, except with respect to:

(a) any Party that has notified the Depositary in writing, within such six month period, of its non-acceptance of that additional regional implementation annex or of the amendment to the regional implementation annex, in which case such annex or amendment shall enter into force for Parties which withdraw their notification of non-acceptance on the ninetieth day after the date on which withdrawal of such notification has been received by the Depositary; and

(b) any Party that has made a declaration with respect to additional regional implementation annexes or amendments to regional implementation annexes in accordance with article 34, paragraph 4, in which case any such annex or amendment shall enter into force for such a Party on the ninetieth day after the date of deposit with the Depositary of its instrument of ratification, acceptance, approval or accession with respect to such annex or amendment.

4. If the adoption of an annex or an amendment to an annex involves an amendment to the Convention, that annex or amendment to an annex shall not enter into force until such time as the amendment to the Convention enters into force