Home1997 Treaties and Agreements ...Argentina (97-826) – Agreement Regarding Mutual Assistance Between Customs Services hide Argentina (97-826) – Agreement Regarding Mutual Assistance Between Customs Services TIAS Office of Treaty Affairs August 26, 1997 Law Enforcement: Customs Administrations Signed at Buenos Aires December 4, 1990; entered into force August 26, 1997. Download attachment [966 KB] Tags Argentina Law Enforcement Treaties