Home1999 Treaties and Agreements ...Costa Rica (13005) – Agreement Concerning Cooperation to Suppress Illicit Traffic hide Costa Rica (13005) – Agreement Concerning Cooperation to Suppress Illicit Traffic TIAS Office of Treaty Affairs November 19, 1999 Law Enforcement: Narcotic Drugs Agreement signed at San Jose December 1, 1998; Entered into force November 19, 1999. Amending protocol signed at San Jose July 2, 1999; Entered into force November 19, 1999. Download attachment [1 MB] Tags Costa Rica Law Enforcement Treaties