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270 Article X

1. The present Convention shall be open for accession by the Governments of any of the States referred to in paragraph 1 of article IX.

2. Accession shall be effected by the deposit of an instrument of accession with the Secretary-General of the United Nations.

Article XI

When fifteen of the Governments referred to in article IX have deposited their instruments of ratification, acceptance or accession, the present Convention shall come into force between them on the thirtieth day after the date of the deposit of the fifteenth instrument of ratification, acceptance or accession. It shall come into force for each other government on the thirtieth day after the deposit of its instrument of ratification, acceptance or accession.

Article XII

1. After the present Convention has been in force for three years, any Contracting Party may denounce it by notification of denunciation to the Secretary-General of the United Nations.

2. Denunciation shall take effect six months after the date of receipt by the Secretary-General of the United Nations of the notification of denunciation.

Article XIII

1. Any Government may at the time of the deposit of its instruments of ratification, acceptance or accession or at any time thereafter by notification addressed to the Secretary-General of the United Nations declare that the present Convention shall extend to all or any of the territories for the international relations of which it is responsible, and the Convention shall extend to the territories named in the notification as from the thirtieth day after the date of receipt of the notification by the Secretary-General of the United Nations or on the date on which the Convention comes into force under article XI whichever is the later.

2. Any Government which has made a declaration under paragraph 1 of this article extending the present Convention to any territory for whose international relations it is responsible may denounce the Convention separately in respect of that territory in accordance with the provisions of article XII. No. 3010