Determination of Origin rules: Brunei Darussalam added to ASEAN India Annexure IV under Fourth Amendment notification. The Central Government, exercising powers under the Customs Tariff Act, 1975, promulgated the Fourth Amendment Rules, 2010 to amend the 2009 Determination of Origin Rules by inserting Brunei Darussalam as S. No. 7 in Annexure IV, thereby formally adding that country to the ASEAN-India list in the principal rules.