---
kind: "section"
citation: "46 C.F.R. § 148.280"
title: "46"
number: "148.280"
heading: "Magnesia, unslaked (lightburned magnesia, calcined magnesite, caustic calcined magnesite)."
url: "https://uscodex.org/cfr/46/148.280"
---

# §148.280. Magnesia, unslaked (lightburned magnesia, calcined magnesite, caustic calcined magnesite).

- (a) This part does not apply to the transport of natural magnesite, magnesium carbonate, or magnesia clinkers.
- (b) When transported by barge, unslaked magnesia must be carried in an unmanned, all-steel, double-hulled barge equipped with weathertight hatches or covers. The barge may not carry any other cargo while unslaked magnesia is on board.
- (c) The shipping paper requirements in [§ 148.60](/cfr/46/148.60.md) of this part and the dangerous cargo manifest requirements in [§ 148.70](/cfr/46/148.70.md) of this part do not apply to unslaked magnesia transported under the requirements of [paragraph (b)](#b) of this section.

## Notes

### Authority

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.

### Source

Source: 75 FR 64591, Oct. 19, 2010, unless otherwise noted.