46 C.F.R. § 120.430 Portable lights.
Title 46 - Shipping
Each vessel must be equipped with at least two operable portable battery lights. One of these lights must be located at the operating station and the other at the access to the propulsion machinery space.
Title 46: Shipping
PART 120—ELECTRICAL INSTALLATION
Subpart D—Lighting Systems
§ 120.430 Portable lights.
