Determination of Origin under preferential trade agreement sets origin rules and commencement upon official gazette publication for tariff treatment. Rules establish the legal framework for determining origin of goods for preferential tariff treatment under the bilateral preferential trade agreement, made under subsection (1) of section 5 of the Customs Tariff Act, 1975. The instrument is titled accordingly and enters into force upon publication in the Official Gazette, providing the statutory basis and commencement trigger for applying origin rules to goods claiming preferences under the agreement.