The Central Asian Nuclear-Weapon-Free Zone (CANWFZ) treaty is a legally binding commitment by the Central Asian States (Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan) not to manufacture, acquire, test, or possess nuclear weapons. The treaty was signed on 8 September 2006 at the former Semipalatinsk nuclear test site in Kazakhstan (hence its unofficial name as the 'Semipalatinsk Treaty') and entered into force on 21 March 2009.
Further materials:
https://web.archive.org/web/20081203163045/http://www.nti.org/db/nisprofs/shared/canwfz/usstate.htm
https://www.un.org/nwfz/content/treaty-nuclear-weapon-free-zone-central-asia
