National Calamity Contingent Duty exemption extends to specified polyester yarn tariff items, removing duty liability. The Central Government, under section 25(1) of the Customs Act read with section 134(4) of the Finance Act, 2003, exempts goods listed in the Table-specific 5402 series entries and heading 5406 (synthetic filament yarn of polyester)-from the whole of the National Calamity Contingent Duty leviable under section 134(1) of the Finance Act, 2003.