50 CFR 18.12 - Prohibited importation.
(b) Regardless of whether an importation is otherwise authorized pursuant to subparts C and D of this part 18, it is unlawful for any person to import into the United States any:
(ii) Taken in another country in violation of the laws of that country;
(ii) The sale in commerce of such product in the country of origin of the product is illegal.
(2) Marine mammal which was nursing at the time of taking, or less than 8 months old, whichever occurs later;
(3) Specimen of an endangered or threatened species of marine mammals;
(4) Specimen taken from a depleted species or stock of marine mammals; or
(d) It is unlawful to import into the United States any fish, whether fresh, frozen, or otherwise prepared, if such fish was caught in a manner proscribed by the Secretary of Commerce for persons subject to the jurisdiction of the United States, whether or not any marine mammals were in fact taken incident to the catching of the fish.