No state, municipal, or other local authority may require the use of Pilots or regulate any aspect of pilotage in any of the waters specified in the Act. Only those persons registered as United States Registered Pilots or Canadian Registered Pilots as defined in this subpart may render pilotage services on any vessel subject to the Act and the Memorandum of Understanding, Great Lakes Pilotage.
46 C.F.R. §401.120