Multilateral agreements in nuclear energy

II. Non-proliferation and nuclear security

Treaty on the Prohibition of Nuclear Weapons (TPNW or Nuclear Weapon Ban Treaty)

Aims to prohibit all nuclear weapon activities, including the development, testing, production, acquisition, possession, stockpiling, use, or threats to use nuclear weapons.

Adopted: 7 July 2017

Opened for signature: 20 September 2017

Entered into force: Not yet in force

Signatures: 70

Parties: 19 (see table below)

More information, including the text of the Treaty on the Prohibition of Nuclear Weapons is available here.

The current status of the Treaty on the Prohibition of Nuclear Weapons is available here.

Contracting Parties to the Treaty on the Prohibition of Nuclear Weapons

Austria Guyana Palau Uruguay
Cook Islands Holy See Palestinian Authority Vanuatu
Costa Rica Mexico* Samoa Venezuela
Cuba New Zealand San Marino Viet Nam
Gambia Nicaragua Thailand  

* Country with at least one nuclear power plant in operation.


Last reviewed: 24 January 2019

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