2. The original instrument, done if possible in African languages, and in English and French, all texts being equally authentic, shall be deposited with the Administrative Secretary-General of the Organisation of African Unity. 3. Any independent African State, Member of the Organisation of African Unity, may at any time notify the Administrative Secretary-General of the Organisation of African Unity of its accession to this Convention. ARTICLE XI ENTRY INTO FORCE This Convention shall come into force upon deposit of instruments of ratification by one-third of the Member States of the Organisation of African Unity. ARTICLE XII AMENDMENT This Convention may be amended or revised if any Member State makes a written request to the Administrative Secretary-General to that effect, provided, however, that the proposed amendment shall not be submitted to the Assembly of Heads of State and Government for consideration until all Member States have been duly notified of it and a period of one year has elapsed. Such an amendment shall not be effective unless approved by at least two-thirds of the Member States Parties to the present Convention. ARTICLE XIII DENUNCIATION 1. Any Member State Party to this Convention may denounce its provisions by a written notification to the Administrative Secretary-General. 2. At the end of one year from the date of such notification, if not withdrawn, the Convention shall cease to apply with respect to the denouncing State. ARTICLE XIV REGISTRATION WITH THE UNITED NATIONS Upon entry into force of this Convention, the Administrative Secretary-General of the OAU shall register it with the Secretary-General of the United Nations, in accordance with Article 102 of the Charter of the United Nations. ARTICLE XV NOTIFICATIONS BY THE ADMINISTRATIVE SECRETARY-GENERAL OF THE ORGANISATION OF AFRICAN UNITY The Administrative Secretary-General of the Organisation of African Unity shall inform all Members of the Organisation: (a) of signatures, ratifications and accessions in accordance with Article X; (b) of entry into force, in accordance with Article XI; (c) of requests for amendments submitted under the terms of Article XII; (d) of denunciations, in accordance with Article XIII. IN WITNESS WHEREOF WE, the Heads of African State and Government, have signed this Convention. DONE in the City of Addis Ababa this 10th day of September 1969.