For purposes of this subchapter—

((1)) ** Covered voyage**

((A)) ** In general** The term “covered voyage” means a voyage of—

((i)) a commercial passenger vessel which extends over 1 or more nights, or

((ii)) a commercial vessel transporting passengers engaged in gambling aboard the vessel beyond the territorial waters of the United States,

((B)) ** Exception for certain voyages on passenger vessels** The term “covered voyage” shall not include a voyage of a passenger vessel of less than 12 hours between 2 ports in the United States.

((2)) ** Passenger vessel** The term “passenger vessel” means any vessel having berth or stateroom accommodations for more than 16 passengers.