46 CFR § 148.450 - Cargoes subject to liquefaction.
---
identifier: "/us/cfr/t46/s148.450"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 148.450 - Cargoes subject to liquefaction."
title_number: 46
title_name: "Shipping"
section_number: "148.450"
section_name: "Cargoes subject to liquefaction."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "N"
subchapter_name: "DANGEROUS CARGOES"
part_number: "148"
part_name: "CARRIAGE OF BULK SOLID MATERIALS THAT REQUIRE SPECIAL HANDLING"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1602; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; 46 U.S.C. 3306, 5111; 49 U.S.C. 5103; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "75 FR 64591, Oct. 19, 2010, unless otherwise noted."
cfr_part: "148"
---
# 148.450 Cargoes subject to liquefaction.
(a) This section applies only to cargoes identified in Table 148.10 of this part with a reference to this section and cargoes identified in the IMSBC Code (incorporated by reference, see § 148.8) as cargoes that may liquefy.
(b) This section does not apply to—
(1) Shipments by unmanned barge; or
(2) Cargoes of coal that have an average particle size of 10mm (.394 in.) or greater.
(c) Definitions as used in this section—
(1) *Cargo subject to liquefaction* means a material that is subject to moisture migration and subsequent liquefaction if shipped with moisture content in excess of the transportable moisture limit.
(2) *Moisture migration* is the movement of moisture by settling and consolidation of a material, which may result in the development of a flow state in the material.
(3) *Transportable moisture limit* or *TML* of a cargo that may liquefy is the maximum moisture content that is considered safe for carriage on vessels.
(d) Except on a vessel that is specially constructed or specially fitted for the purpose of carrying such cargoes (see also section 7 of the IMSBC Code, incorporated by reference, see § 148.8), a cargo subject to liquefaction may not be transported by vessel if its moisture content exceeds its TML.
(e) The shipper of a cargo subject to liquefaction must give the master the material's moisture content and TML.
(f) The master of a vessel shipping a cargo subject to liquefaction must ensure that—
(1) A cargo containing a liquid is not stowed in the same cargo space with a cargo subject to liquefaction; and
(2) Precautions are taken to prevent the entry of liquids into a cargo space containing a cargo subject to liquefaction.
(g) The moisture content and TML of a material may be determined by the tests described in Appendix 2, Section 1, of the IMSBC Code (incorporated by reference, see § 148.8).