Treaty on the Prohibition of Nuclear Weapons

The Treaty on the Prohibition of Nuclear Weapons (TPNW), or the Nuclear Weapon Ban Treaty, is the first legally binding international agreement to comprehensively prohibit nuclear weapons with the ultimate goal being their total elimination. It was adopted on 7 July 2017, opened for signature on 20 September 2017, and entered into force on 22 January 2021.[3][4][5][6]

Nuclear Weapon Ban Treaty
Treaty on the Prohibition of Nuclear Weapons
TypeArms control, nuclear disarmament
Signed20 September 2017[1]
LocationNew York, U.S.
Sealed7 July 2017
Effective22 January 2021[2]
Condition90 days after the fiftieth instrument of ratification, acceptance, approval or accession has been deposited
Parties56[1] (complete list)
DepositaryUnited Nations Secretary-General
LanguagesArabic, Chinese, English, French, Russian and Spanish
Read Online
Treaty on the Prohibition of Nuclear Weapons at Wikisource

For those nations that are party to it, the treaty prohibits the development, testing, production, stockpiling, stationing, transfer, use and threat of use of nuclear weapons, as well as assistance and encouragement to the prohibited activities. For nuclear armed states joining the treaty, it provides for a time-bound framework for negotiations leading to the verified and irreversible elimination of its nuclear weapons programme.

A mandate adopted by the United Nations General Assembly on 23 December 2016 scheduled two sessions for negotiations: 27 to 31 March and from 15 June to 7 July, 2017.[7] The treaty passed on schedule on 7 July with 122 in favour, 1 against (Netherlands), and 1 official abstention (Singapore). 69 nations did not vote, among them all of the nuclear weapon states and all NATO members except the Netherlands.[8]