Rules of origin define preferential tariff eligibility under CECA, specifying title, commencement and substitution of those rules. Rules establishing the Rules of Origin for goods eligible for preferential tariff concessions under the Comprehensive Economic Cooperation Agreement are made under the Customs Tariff Act, prescribe the short title as the Customs Tariff Determination of Origin of Goods under the Comprehensive Economic Cooperation Agreement between the Republic of India and Republic of Singapore Rules, 2005, and fix the date on which the rules come into force; a subsequent notification substituted the short title wording.