49 CFR §397.2
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.