Rulebook › 49 CFR Part 171

PART 171—GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS

Official text from the eCFR, current as of 2026-10-21.

Subpart A—Applicability, General Requirements, and North American Shipments

• § 171.1 Applicability of Hazardous Materials Regulations (HMR) to persons and functions.
• § 171.2 General requirements.
• § 171.3 Hazardous waste.
• § 171.4 Marine pollutants.
• § 171.6 Control numbers under the Paperwork Reduction Act.
• § 171.7 Reference material.
• § 171.8 Definitions and abbreviations.
• § 171.9 Rules of construction.
• § 171.10 Units of measure.
• § 171.11 [Reserved]
• § 171.12 North American Shipments.
• § 171.12a [Reserved]
• § 171.14 [Reserved]

Subpart B—Incident Reporting, Notification, BOE Approvals and Authorization

• § 171.15 Immediate notice of certain hazardous materials incidents.
• § 171.16 Detailed hazardous materials incident reports.
• § 171.17-171.18 [Reserved]
• § 171.19 Approvals or authorizations issued by the Bureau of Explosives.
• § 171.20 Submission of Examination Reports.
• § 171.21 Assistance in investigations and special studies.

Subpart C—Authorization and Requirements for the Use of International Transport Standards and Regulations

• § 171.22 Authorization and conditions for the use of international standards and regulations.
• § 171.23 Requirements for specific materials and packagings transported under the ICAO Technical Instructions, IMDG Code, Transport Canada TDG Regulations, or the IAEA Regulations.
• § 171.24 Additional requirements for the use of the ICAO Technical Instructions.
• § 171.25 Additional requirements for the use of the IMDG Code.
• § 171.26 Additional requirements for the use of the IAEA Regulations.