or approval) of an amendment shall be notified to the depositary in writing. article 27 sets the rules for adoption and amendment of annexes. article 28 establishes the rules for the right to vote: one party, one vote, except in the case of a regional economic integration organization, which, on matters within its competence, shall exercise its right to vote with a number of votes equal to the number of its members states that are parties to the convention. such an organization shall not exercise its right to vote if any of its member states exercises its right to vote and vice versa. article 29 relates to the signature of the convention, which was open for one year until 9 october 2014. article 30 deals with the ratification, acceptance, approval of the convention or accession thereto. article 31 deals with the convention's entry into the force, which will take place on the ninetieth day after the date of deposit of the fiftieth instrument of ratification, acceptance, approval or accession. article 32 states that no reservations may be made to the convention. article 33 gives the right to parties to withdraw from the convention at any time after three years from the date on which the convention has entered into force for them, through written notification to the depositary. any such withdrawal shall take effect one year after the receipt of the notification by the depositary or any later specified date. article 34 names the secretary-general of the united nations as the depositary of the convention. article 35 states that the arabic, chinese, english, french, russian and spanish texts of the convention are equally authentic. minamata convention on mercury cops cop-1 (geneva, switzerland), 24 - 29 september 2017 cop-2 (geneva, switzerland), 19 - 23 november 2018 cop-3 (geneva, switzerland), 25 - 29 november 2019 cop-4 (online; bali, indonesia), 01 - 05 november 2021 (first segment), 21 - 25 march 2022 (second segment) cop-5 (geneva, switzerland), 30 october - 03 november 2023