16 U.S.C. § 7405

The Secretary, and the Secretary of the department in which the Coast Guard is operating, shall conduct foreign vessel inspections in ports subject to the jurisdiction of the United States as necessary to achieve the purposes of the Agreement and this chapter. If, following an inspection, the Secretary has reasonable grounds to believe that a foreign vessel has engaged in IUU fishing or fishing-related activities in support of such fishing, the Secretary may take enforcement action under this chapter or other applicable law, and shall deny the vessel the use of port services, in accordance with section 7404 of this title .