15 amendment adopted by a majority of States Parties present and voting at the conference shall be submitted to the General Assembly for approval. 2. An amendment adopted in accordance with paragraph 1 of the present article shall enter into force when it has been approved by the General Assembly of the United Nations and accepted by a twothirds majority of States Parties. 3. When an amendment enters into force, it shall be binding on those States Parties which have accepted it, other States Parties still being bound by the provisions of the present Convention and any earlier amendments which they have accepted. Article 51 1. The Secretary-General of the United Nations shall receive and circulate to all States the text of reservations made by States at the time of ratification or accession. 2. A reservation incompatible with the object and purpose of the present Convention shall not be permitted. 3. Reservations may be withdrawn at any time by notification to that effect addressed to the Secretary-General of the United Nations, who shall then inform all States. Such notification shall take effect on the date on which it is received by the Secretary-General Article 52 A State Party may denounce the present Convention by written notification to the Secretary-General of the United Nations. Denunciation becomes effective one year after the date of receipt of the notification by the Secretary-General. Article 53 The Secretary-General of the United Nations is designated as the depositary of the present Convention. Article 54 The original of the present Convention, of which the Arabic, Chinese, English, French, Russian and Spanish texts are equally authentic, shall be deposited with the Secretary-General of the United Nations. IN WITNESS THEREOF the undersigned plenipotentiaries, being duly authorized thereto by their respective governments, have signed the present Convention.