Artikel 15

1. Any Member State may propose an amendment to this Convention, in writing, to the Secretary- General.
2. The Secretary-General shall circulate the proposed amendment in the official languages to all Member States at least six months in advance of its consideration by the General Assembly.
3. The proposed amendment shall be adopted by vote of the General Assembly.
4. Any amendment adopted in accordance with paragraph 3 shall be sent by the Secretary-General to the Depositary. The latter shall notify all Member States of the adoption of the amendment.
5. The amendment shall enter into force for all Member States six months after written notifications of acceptance by two-thirds of the Member States have been received by the Depositary, except for a Member State which has notified the Depositary, prior to the entry into force of such amendment, that the amendment shall enter into force for that Member State only after a subsequent notification of its acceptance.
6. Notwithstanding paragraph 5, the General Assembly may decide by consensus that the amendment shall come into force for all Member States six months after written notifications of acceptance by two-thirds of the Member States have been received by the Depositary. If within this period of six months a Member State gives notification of withdrawal from the Organization on account of an amendment, the withdrawal shall, notwithstanding Article 21, take effect on the date on which such amendment comes into force.
7. The Depositary shall inform the Member States and the Secretary-General of the entry into force of the amendment, specifying the date of its entry into force.