46 C.F.R. § 183.420 Navigation lights.
Title 46 - Shipping
All vessels must have navigation lights that are in compliance with the applicable sections of the International and Inland Navigation Rules, except that a vessel of more than 19.8 meters (65 feet) in length must also have navigation lights that meet UL 1104, “Standards for Marine Navigation Lights,” or other standard specified by the Commandant.
Title 46: Shipping
PART 183—ELECTRICAL INSTALLATION
Subpart D—Lighting Systems
§ 183.420 Navigation lights.
