1 If the transverse watertight bulkheads in a
region of the ship are carried to a higher deck than in the remainder
of the ship, openings located in the bulkhead at the step may be considered
as being located above the freeboard deck.
2 All openings in the shell plating below the
upper deck throughout that region of the ship should be treated as
being below the freeboard deck, similar to the bulkhead deck for passenger
ships (see relevant figure under regulation 13 above), and the provisions
of regulation 15 should be applied.