1. Any State Party to the present Protocol may propose an amendment and file it with the Secretary-General of the United Nations. The Secretary-General shall thereupon communicate the proposed amendment to the States Parties to the present Protocol with a request that they notify him whether they favour a conference of States Parties for the purpose of considering and voting upon the proposal. In the event that within four months from the date of such communication at least one third of the States Parties favour such a conference, the Secretary-General shall convene the conference under the auspices of the United Nations. Any amendment adopted by a majority of two thirds of the States Parties present and voting at the conference shall be submitted by the Secretary-General of the United Nations to all States Parties for acceptance.

2. An amendment adopted in accordance with paragraph 1 of the present article shall come into force when it has been accepted by a two -thirds majority of the States Parties to the present Protocol in accordance with their respective constitutional processes.

3. When amendments come into force, they shall be binding on those States Parties that have accepted them, other States Parties still being bound by the provisions of the present Protocol and any earlier amendment that they have accepted.