46 C.F.R. § 111.40-9 Locking device.
Title 46 - Shipping
The door of each panelboard enclosure that is accessible to any passenger must have a locking device.
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.40—Panelboards
§ 111.40-9 Locking device.

