Home1998 Treaties and Agreements ...Latvia (12922) – Agreement Concerning Security Measures for the Protection of Classified Military Information hide Latvia (12922) – Agreement Concerning Security Measures for the Protection of Classified Military Information TIAS Office of Treaty Affairs January 15, 1998 Defense: Security of Military Information Agreement signed at Washington January 15, 1998; Entered into force January 15, 1998. Download attachment [872 KB] Tags Defense Latvia Treaties