46 CFR § 154.435
General
April 15, 2021
(a) The design of a semi-membrane tank, the supporting insulation for the tank, and the supporting hull structure for the tank must be specially approved by the Commandant (CG-ENG).
(b) A semi-membrane tank must be designed to meet:
(1) §154.425 through §154.432;
(2) §154.437 through §154.440; or
(3) §154.444 through §154.449.
[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]