1. After the expiry of three years from the entry into force of this Treaty, a Party may propose an amendment and transmit it to the depositary who shall thereupon communicate the proposed amendment to the Parties for the purpose of considering the proposal. If at least three Parties wish so, the depositary shall convene a meeting of the Parties to discuss and decide on the proposal. The meeting shall make every effort to achieve consensus on each amendment. If all efforts have been exhausted, an amendment shall require for its adoption a two- thirds majority vote of the Parties present and voting.

2. An amendment adopted in accordance with

paragraph 1 of this article

is subject to ratification, acceptance or approval by the Parties.

3. An amendment shall enter into force in respect of a Party thirty days after the date of the deposit with the depositary of an instrument of ratification, acceptance or approval of such amendment by that Party.

4. A Party which does not ratify, accept or approve an amendment remains to be bound by the provisions of this Treaty and any earlier amendment that it has ratified, accepted or approved.