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.
Source: Wikipedia — Treaty on the Prohibition of Nuclear Weapons (CC BY-SA 4.0)