Home2016 Treaties and Agreements ...Trinidad and Tobago (16-921) – Agreement Regarding Mutual Assistance Between Their Customs Administrations hide Trinidad and Tobago (16-921) – Agreement Regarding Mutual Assistance Between Their Customs Administrations TIAS Office of Treaty Affairs September 21, 2016 Law Enforcement: Customs Agreement signed at Port of Spain September 21, 2016; entered into force September 21, 2016. Download attachment [556 KB] Tags Law Enforcement Treaties Trinidad and Tobago