46 CFR § 151.56-1 - Prohibited materials.

---
identifier: "/us/cfr/t46/s151.56-1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 151.56-1 - Prohibited materials."
title_number: 46
title_name: "Shipping"
section_number: "151.56-1"
section_name: "Prohibited materials."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "O"
subchapter_name: "CERTAIN BULK DANGEROUS CARGOES"
part_number: "151"
part_name: "BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES"
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. 1903; 46 U.S.C. 3703; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGFR 70-10, 35 FR 3714, Feb. 25, 1970, unless otherwise noted."
cfr_part: "151"
---


# 151.56-1 Prohibited materials.

When one of the following paragraphs of this section is referenced in table 151.05, the materials listed in that paragraph may not be used in components that contact the cargo or its vapor:

(a) Aluminum or aluminum alloys.

(b) Copper or copper alloys.

(c) Zinc, galvanized steel, or alloys having more than 10 percent zinc by weight.

(d) Magnesium.

(e) Lead.

(f) Silver or silver alloys.

(g) Mercury.

[CGD 88-100, 54 FR 40041, Sept. 29, 1989]