46 C.F.R. § 154.439 Tank design.
Title 46 - Shipping
An independent tank type A must meet the deep tank standard of the American Bureau of Shipping published in “Rules for Building and Classing Steel Vessels”, 1981, and must: (a) Withstand the internal pressure determined under §154.407; (b) Withstand loads from tank supports calculated under §§154.470 and 154.471; and (c) Have a corrosion allowance that meets §154.412. [CGD 74–289, 44 FR 26009, May 3, 1979, as amended by CGD 77–069, 52 FR 31630, Aug. 21, 1987]
Title 46: Shipping
PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES
Subpart C—Design, Construction and Equipment
Independent Tank Type A
§ 154.439 Tank design.

