CFR /  Title 46  /  Part 154  /  Sec. 154.305 Segregation of hold spaces from the sea.

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 [deg]C (14 [deg]F); and

(b) Wing tanks if the cargo tanks meet this part for design temperatures colder than -55 [deg]C (-67 [deg]F).