Artikel 20

1. An amendment to this Convention may be proposed by any Party. The proposed amendment shall be circulated by the Director General to all Parties and to Observers. The Assembly shall consider the proposed amendment not earlier than six months thereafter. This period may in any particular case be reduced by up to three months by a substantive decision of the Assembly. Providers and Observers shall have the right to provide comments and input to Parties concerning the proposed amendment.
2. If adopted by the Assembly, the amendment shall enter into force one hundred and twenty days after the Depositary has received notices of acceptance from two-thirds of those States which, at the time of adoption by the Assembly, were Parties. Upon entry into force, the amendment shall become binding upon those Parties that have accepted it. For any other State which was a Party at the time of adoption of the amendment by the Assembly, the amendment shall become binding on the day the Depositary receives its notice of acceptance.