Home2007 Treaties and Agreements ...European Union (07-430.1) – Agreement on the Security of Classified Information hide European Union (07-430.1) – Agreement on the Security of Classified Information TIAS Office of Treaty Affairs April 30, 2007 Defense: Security of Information Agreement signed at Washington April 30, 2007; entered into force April 30, 2007. Download attachment [684 KB] Tags Defense European Union Treaties