Home1999 Treaties and Agreements ...Latvia (12944) – Agreement Regarding Mutual Assistance Between Their Customs Administrations hide Latvia (12944) – Agreement Regarding Mutual Assistance Between Their Customs Administrations TIAS Office of Treaty Affairs July 23, 1999 Law Enforcement: Customs Agreement signed at Washington April 17, 1998; Entered into force July 23, 1999. Download attachment [883 KB] Tags Latvia Law Enforcement Treaties