46 CFR § 171.114 - Penetrations and openings in watertight bulkheads in a vessel less than a 100 gross tons.
(a) Penetrations and openings in watertight bulkheads must -
(1) Be kept as high and as far inboard as practicable; and
(2) Have means to make them watertight.
(b) Watertight bulkheads must not have sluice valves.
(c) Each main traverse watertight bulkhead must extend to the bulkhead deck.