49 CFR § 397.2
Compliance with Federal motor carrier safety regulations
November 18, 2020
A motor carrier or other person to whom this part is applicable must comply with the rules in parts 390 through 397, inclusive, of this subchapter when he/she is transporting hazardous materials by a motor vehicle which must be marked or placarded in accordance with §177.823 of this title.
[37 FR 18080, Sept. 7, 1972]