Home2017 Treaties and Agreements ...Costa Rica (17-509) – Agreement Regarding Mutual Assistance Between their Customs Administrations hide Costa Rica (17-509) – Agreement Regarding Mutual Assistance Between their Customs Administrations TIAS Office of Treaty Affairs May 9, 2017 Law Enforcement: Customs Agreement signed at San Jose May 28, 2015; entered into force May 9, 2017. Download attachment [1 MB] Tags Costa Rica Law Enforcement Treaties