46 C.F.R. § 108.221 Storm rails.
Title 46 - Shipping
Each unit must have a storm rail in the following locations: (a) On each deckhouse side that is normally accessible. (b) On each side of each passageway that is wider than 1.83 meters (6 feet). (c) On at least one side of each passageway that is less than 1.83 meters (6 feet) wide.
Title 46: Shipping
PART 108—DESIGN AND EQUIPMENT
Subpart B—Construction and Arrangement
Rails
§ 108.221 Storm rails.