Artikel XXIII

1. A State Party to this Convention may, by written communication addressed to the Director-General of UNESCO, propose amendments to this Convention. The Director-General shall circulate such communication to all States Parties. If within six months of the date of dispatch of the communication, no less than one half of the States Parties to the Convention reply favourably to the request, the Director-General shall present such proposal to the next session of the Intergovernmental Conference of the States Parties for discussion and possible adoption.
2. Amendments shall be adopted by a two-thirds majority of States Parties present and voting.
3. Once adopted, amendments to this Convention shall be submitted to the States Parties for ratification, acceptance, approval, or accession.
4. For States Parties which have ratified, accepted, approved, or acceded to them, amendments to this Convention shall enter into force three months after the deposit by two thirds of the States Parties of the instruments referred to in paragraph 3 of this Article. Thereafter for each State Party which ratifies, accepts, approves, or accedes to an amendment, said amendment shall enter into force three months after the date on which that State Party has deposited its instrument of ratification, acceptance, approval, or accession.
5. A State which becomes a State Party to this Convention after the entry into force of amendments in conformity with paragraph 4 of this Article shall, failing an expression of different intention, be considered to be:
a) A State Party to this Convention as so amended; and
b) A State Party to the unamended Convention in relation to any State Party not bound by the amendments.