46 CFR § 153.365 - Liquid overpressurization protection.
(a) Except as noted in paragraph (b) of this section, a containment system requiring closed or restricted gauging must:
(1) Be designed to withstand the maximum pressure that develops during an overfill of the densest cargo endorsed for the containment system; or
(2) Have an overflow control system that meets § 153.408; or
(3) Meet the requirements specified by the Commandant (CG-ENG).
(b) A containment system requiring restricted gauging, except for those cargoes that reference §§ 153.525 or 153.527, may be equipped with a spill valve that:
(1) Meets ASTM F 1271 (incorporated by reference, see § 153.4); and