The States Parties shall make every effort to achieve consensus on each amendment. If all efforts at consensus have been exhausted, and no agreement reached, the amendment shall, as a last resort, be adopted by a three-quarters majority vote of the States Parties present and voting at the meeting of the Conference of States Parties. For the purposes of this Article, States Parties present and voting means States Parties present and casting an affirmative or negative vote. The Depositary shall communicate any adopted amendment to all States Parties.