In vessels having cargo containment systems required by this part to have a secondary barrier, hold spaces must be segregated from the sea by:
(a) A double bottom if the cargo tanks meet this part for design temperatures colder than −10 °C (14 °F); and
(b) Wing tanks if the cargo tanks meet this part for design temperatures colder than −55 °C (−67 °F).
source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.
cite as: 46 CFR 154.305