Home2010 Treaties and Agreements ...Antigua and Barbuda (10-927) – Agreement Concerning Cooperation to Suppress the Proliferation of Weapons of Mass Destruction, their Delivery Systems, and Related Materials by Sea hide Antigua and Barbuda (10-927) – 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 September 27, 2010 Weapons: Proliferation Agreement signed at St. John’s April 26, 2010; entered into force September 27, 2010. Download attachment [549 KB] Tags Antigua and Barbuda Treaties Weapons