33 CFR § 161.6 - Preemption.

The regulations in this part have preemptive impact over State laws or regulations on the same subject matter. The Coast Guard has determined, after considering the factors developed by the Supreme Court in U.S. v. Locke, 529 U.S. 89 (2000), that by enacting 46 U.S.C. Chapter 700 'Ports and Waterways Safety', Congress intended that Coast Guard regulations preempt State laws or regulations regarding vessel traffic services in United States ports and waterways.

[USCG–1998–4399, 75 FR 66314, Oct. 28, 2010, as amended by USCG–2020–0304, 85 FR 58280, Sept. 18, 2020]