3. Treaty on the Prohibition of the Emplacement of Nuclear Weapons and Other Weapons of Mass Destruction on the Seabed and the Ocean Floor and in the Subsoil Thereof, done at London, Moscow, and Washington February 11, 1971

Entered into force May 18, 1972.

In accordance with Article X, paragraph 2, the Treaty 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 X, paragraph 3, the Treaty entered into force after the deposit of instruments of ratification by 22 Governments, including the Governments designated as Depositary Governments of the Treaty. In accordance with Article X, paragraph 4, for States whose instruments of ratification or accession are deposited subsequent to the entry into force of the Treaty, it shall enter into force on the date of deposit of their instruments of ratification or accession.