This Act shall have effect in relation to fish (within the meaning of section 2 of the Fisheries Act 1983) and marine mammals (within the meaning of section 2 of the Marine Mammals Protection Act 1978),—
(a) Taken in the exclusive economic zone; and
(b) Carried on board a foreign licensed vessel, a vessel registered under the Fisheries Act 1983, or a vessel operated by the Crown,—
as if they are not imported goods.