The Nuclear Weapon Ban Treaty, is a legally binding international agreement that aims to comprehensively prohibit nuclear weapons, leading to their total elimination.

See https://en.wikipedia.org/wiki/Treaty_on_the_Prohibition_of_Nuclear_Weapons

AI writeup:  "The Treaty on the Prohibition of Nuclear Weapons (TPNW), also known as the Nuclear Weapon Ban Treaty, is a legally binding international agreement that aims to comprehensively prohibit nuclear weapons, leading to their total elimination. It was adopted on July 7, 2017, and entered into force on January 22, 2021."

ICAN has a full writeup at https://www.icanw.org/the_treaty.

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