Latin American Nuclear-Weapon-Free Zone

Treaty of Tlatelolco

Treaty for the Prohibition of Nuclear Weapons in Latin America and the Caribbean
Signed	14 February 1967
Location	Mexico City
Effective	22 April 1968
Condition	Deposit of ratifications (Art. 29) / waiver according to Article 29
Parties	33

The Treaty of Tlatelolco is the conventional name given to the Treaty for the Prohibition of Nuclear Weapons in Latin America and the Caribbean. It is embodied in the OPANAL (Spanish: Organismo para la Proscripción de las Armas Nucleares en la América Latina y el Caribe, English: the Agency for the Prohibition of Nuclear Weapons in Latin America and the Caribbean).

Under the treaty, the states parties agree to prohibit and prevent the "testing, use, manufacture, production or acquisition by any means whatsoever of any nuclear weapons" and the "receipt, storage, installation, deployment and any form of possession of any nuclear weapons."

There are two additional protocols to the treaty: Protocol I binds those overseas countries with territories in the region (the United States, the United Kingdom, France, and the Netherlands) to the terms of the treaty. Protocol II requires the world's declared nuclear weapons states to refrain from undermining in any way the nuclear-free status of the region; it has been signed and ratified by the USA, the UK, France, China, and Russia.

The treaty also provides for a comprehensive control and verification mechanism, overseen by the Agency for the Prohibition of Nuclear Weapons in Latin America and the Caribbean (OPANAL), based in Mexico City.

Meeting in the Tlatelolco district of Mexico City on 14 February 1967, the nations of Latin America and the Caribbean drafted this treaty to keep their region of the world free of nuclear weapons. Whereas Antarctica had earlier been declared a nuclear-weapon-free zone under the 1961 Antarctic Treaty, this was the first time such a ban was put in place over such a vast, populated area.

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