49 CFR § 397.1 - Application of the rules in this part.

---
identifier: "/us/cfr/t49/s397.1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 397.1 - Application of the rules in this part."
title_number: 49
title_name: "Transportation"
section_number: "397.1"
section_name: "Application of the rules in this part."
chapter_name: "FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "B"
subchapter_name: "FEDERAL MOTOR CARRIER SAFETY REGULATIONS"
part_number: "397"
part_name: "TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 322; 49 CFR 1.87. Subpart A also issued under 49 U.S.C. 5103, 31136, 31502, and 49 CFR 1.97. Subparts C, D, and E also issued under 49 U.S.C. 5112, 5125."
regulatory_source: "36 FR 4876, Mar. 13, 1971, unless otherwise noted."
cfr_part: "397"
---


# 397.1 Application of the rules in this part.

(a) The rules in this part apply to each motor carrier engaged in the transportation of hazardous materials by a motor vehicle which must be marked or placarded in accordance with § 177.823 of this title and to—

(1) Each officer or employee of the motor carrier who performs supervisory duties related to the transportation of hazardous materials; and

(2) Each person who operates or who is in charge of a motor vehicle containing hazardous materials.

(b) Each person designated in paragraph (a) of this section must know and obey the rules in this part.

[36 FR 4876, Mar. 13, 1971, as amended at 36 FR 16067, Aug. 19, 1971; 53 FR 18058, May 19, 1988; 60 FR 38749, July 28, 1995]