CFR /  Title 46  /  Part 45  /  Sec. 45.179 Cargo limitations.

(a) Only dry cargoes may be carried. Liquid cargoes, even in drums or tank containers, may not be carried.

(b) Hazardous materials, as defined in part 148 of this chapter and 49 CFR chapter 1, subchapter C, may not be carried.