Section 2 shall not apply with respect to possession of a shark fin that was taken lawfully under a State, territorial, or Federal license or permit to take or land sharks, if the shark fin is separated from the shark in a manner consistent with the license or permit and is—
(1)
destroyed or discarded upon separation;
(2)
used for noncommercial subsistence purposes in accordance with State or territorial law;
(3)
used solely for display or research purposes by a museum, college, or university, or by any other person under a State or Federal permit to conduct noncommercial scientific research; or
(4)
retained by the license or permit holder for a noncommercial purpose.