PART III CLOSING OF OPENINGS IN HULLS AND WATERTIGHT BULKHEADS

23 Marking of doors, mechanisms and valves
In every ship constructed on or after 25th May 1980 all doors, mechanisms and valves connected with the damage control and watertight integrity of the ship shall be suitably marked to ensure that they may be properly used to provide maximum safety.
Reg. 23 in force at 12.11.1998, see reg. 1(1)