Home2015 Treaties and Agreements ...Singapore (15-201) – Agreement Regarding Mutual Assistance Between Customs Administrations hide Singapore (15-201) – Agreement Regarding Mutual Assistance Between Customs Administrations TIAS Office of Treaty Affairs February 1, 2015 Law Enforcement: Customs Agreement signed at Singapore December 1, 2014; entered into force February 1, 2015. Download attachment [598 KB] Tags Law Enforcement Singapore Treaties