ENFORCEMENT.

SEC. 4105. ENFORCEMENT. (a) General Authority.—The Secretary of Transportation shall enforce this title under section 89 of title 14, United States Code. The Secretary may authorize other officers or employees of the United States Government to enforce this title under that section. (b) Periodic Examinations.—The Secretary shall conduct periodic examinations of vessels operating under this title transporting municipal or commercial waste to determine that each of these vessels has a permit issued under section 4102 of this Act. (c) Refusal of Clearance.—The Secretary of the Treasury may refuse the clearance required by section 4197 of the Revised Statutes of the United States (46 App. U.S.C. 91), to any vessel subject to this title which does not have a permit required under section 4102 of this Act. (d) Denial of Entry and Detention.—If a vessel does not comply with this title, the Secretary of Transportation may— (1) deny entry to any place in the United States; and (2) detain at the place in the United States from which it is about to depart. (e) Persistent Violators.—The Administrator shall conduct an investigation of the owner or operator of a vessel or facility if the owner has 5 or more separate violations during a 6-month period.