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Regulations last checked for updates: Oct 02, 2026
Title 49 - Transportation last revised: Sep 30, 2026
All Titles
Title 49
Chapter I
Part 171
Subpart A - 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]
authority:
49 U.S.C. 5101-5128
,
44701
; Pub. L. 101-410 section 4; Pub. L. 104-134, section 31001; Pub. L. 114-74 section 701 (
28 U.S.C. 2461
note);
49 CFR 1.81
and 1.97
source:
29 FR 18562, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.
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