Entered into force September 1, 1972.
In accordance with Article XXIV, paragraph 2, the Convention shall be subject to ratification by signatory States and instruments of ratification and instruments of accession shall be deposited with the designated Depositary Governments [Russian Federation, United Kingdom, United States]. In accordance with Article XXIV, paragraph 3, the Agreement entered into force on the deposit of the fifth instrument of ratification. In accordance with Article XXIV, paragraph 4, for States whose instruments of ratification or accession are deposited subsequent to the entry into force of the Convention, it shall enter into force on the date of the deposit of their instruments of ratification or accession.