(1) Despite anything to the contrary provided by the principal Act, but subject to the provisions of subsection (2), customs duty imposed on goods of any description shall not apply to goods of the like description which are of—
(a) Caribbean Community Market area origin; or
(b) Common Market area origin.
(2) The provisions of subsection (1) shall be subject to the provisions of any order made by the Governor General under section 18 or 19 of the principal Act whereby customs duty on any goods of Caribbean Community Market area origin or Common Market area origin is reduced or increased under the appropriate tariff mentioned in section 3(1) under or in accordance with the provisions of the Agreement or, as the case may be, of the Common Market Agreement.