36 CFR § 3.2 - Do other boating laws and regulations apply to me when I operate my boat on park waters?
(a) In addition to the regulations contained in this part, the NPS adopts applicable laws and regulations of the United States Coast Guard. The USCG laws and regulations are found in Title 14 United States Code, Title 33 United States Code, Title 46 United States Code, and 33 CFR chapter I, 46 CFR chapter I and III and 49 CFR chapter IV. NPS applies the adopted laws and regulations to vessels and their operation on all waters (navigable and non-navigable) subject to NPS jurisdiction. Therefore, Federal regulations authorizing an action by the “captain of the port” or another officer or employee of the United States Coast Guard, authorize a like action by the superintendent.
(b) Except to the extent that directives of the United States Coast Guard have expressly or implicitly preempted inconsistent state laws and regulations or as otherwise provided by subsection (a), vessels and their operation on all waters subject to NPS jurisdiction are governed by non-conflicting boating safety laws and regulations of the State within whose interior boundaries a park area or portion thereof is located.