46 C.F.R. § 108.157 Locked doors.
Title 46 - Shipping
No door to the required means of escape may be designed to lock except— (a) A crash door or a door that has a locking device that can be easily forced, if on both sides of the door a permanent and easily seen instruction is placed; or (b) An outside door to a deckhouse if the door can be locked by key only and if the master or person in charge has control of the key to the door's lock.
Title 46: Shipping
PART 108—DESIGN AND EQUIPMENT
Subpart B—Construction and Arrangement
Means of Escape
§ 108.157 Locked doors.
