Home2005 Treaties and Agreements ...Belize (05-1019) – Agreement Concerning Cooperation to Suppress the Proliferation of Weapons of Mass Destruction, their Delivery Systems, and Related Materials by Sea hide Belize (05-1019) – Agreement Concerning Cooperation to Suppress the Proliferation of Weapons of Mass Destruction, their Delivery Systems, and Related Materials by Sea TIAS Office of Treaty Affairs October 19, 2005 Nonproliferation: Weapons Agreement signed at Washington August 4, 2005; entered into force October 19, 2005. Download attachment [784 KB] Tags Arms Control and Nonproliferation Belize Nonproliferation Treaties