---
kind: "section"
citation: "46 C.F.R. § 154.459"
title: "46"
number: "154.459"
heading: "General."
url: "https://uscodex.org/cfr/46/154.459"
---

# §154.459. General.

- (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.
- (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](/cfr/46/154.460.md).
- (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).
- (d) If Table 3 allows the hull to be a secondary barrier, the vessel's hull must:
  - (1) Meet [§§ 154.605 through 154.630](/cfr/46/154.605..154.630.md); and
  - (2) **Be designed for the stresses resulting from the design temperature.**

## Notes

### Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]

### Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.

### Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]