StacksVerified U.S. regulatory reference

46 CFR §154.459

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Each cargo tank must have a secondary barrier that meets Table 3 and except as allowed in Table 3, the hull must not be the secondary barrier.
  2. (b)If the Commandant (CG-ENG) specially approves an integral tank for a design temperature at atmospheric pressure lower than −10 °C (14 °F), the integral tank must have a complete secondary barrier that meets § 154.460.
  3. (c)If the Commandant (CG-ENG) specially approves a semi-membrane tank under the requirements of an independent tank type B, the semi-membrane tank may have a partial secondary barrier specially approved by the Commandant (CG-ENG).
  4. (d)If Table 3 allows the hull to be a secondary barrier, the vessel's hull must:
    1. (1)Meet §§ 154.605 through 154.630; and
    2. (2)Be designed for the stresses resulting from the design temperature.