(1) Any Contracting Party may propose amendments to this Treaty.
(2) The text of any proposed amendment to this Treaty shall be communicated to the Contracting Parties by the Secretariat at least three months before the date on which it is proposed for adoption by the Charter Conference.
(3) Amendments to this Treaty, texts of which have been adopted by the Charter Conference, shall be communicated by the Secretariat to the Depositary which shall submit them to all Contracting Parties for ratification, acceptance or approval.
(4) Instruments of ratification, acceptance or approval of amendments to this Treaty shall be deposited with the Depositary. Amendments shall enter into force between Contracting Parties having ratified, accepted or approved them on the ninetieth day after deposit with the Depositary of instruments of ratification, acceptance or approval by at least threefourths of the Contracting Parties. Thereafter the amendments shall enter into force for any other Contracting Party on the ninetieth day after that Contracting Party deposits its instrument of ratification, acceptance or approval of the amendments.