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Title 49

Displaying title 49, up to date as of 6/10/2026. Title 49 was last amended 6/10/2026.
There have been changes in the last two weeks to Subchapter C.
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Title 49TransportationPart / Section
Subtitle BOther Regulations Relating to Transportation100 – 1699
Chapter IPipeline and Hazardous Materials Safety Administration, Department of Transportation100 – 199
Subchapter CHazardous Materials Regulations171 – 185
Part 171General Information, Regulations, and Definitions171.1 – 171.26
Subpart AApplicability, General Requirements, and North American Shipments171.1 – 171.14
Subpart BIncident Reporting, Notification, BOE Approvals and Authorization171.15 – 171.21
Subpart CAuthorization and Requirements for the Use of International Transport Standards and Regulations171.22 – 171.26
Part 172Hazardous Materials Table, Special Provisions, Hazardous Materials Communications, Emergency Response Information, Training Requirements, and Security Plans172.1 – 172.822
Part 173Shippers—General Requirements for Shipments and Packagings173.1 – 173.477
Part 174Carriage by Rail174.1 – 174.750
Part 175Carriage by Aircraft175.1 – 175.900
Subpart AGeneral Information and Regulations175.1 – 175.34
Subpart BLoading, Unloading and Handling175.75 – 175.90
Subpart CSpecific Regulations Applicable According to Classification of Material175.310 – 175.900
Part 176Carriage by Vessel176.1 – 176.907
Part 177Carriage by Public Highway177.800 – 177.870
Subpart AGeneral Information and Regulations177.800 – 177.823
Subpart BLoading and Unloading177.834 – 177.843
Subpart CSegregation and Separation Chart of Hazardous Materials177.848
Subpart DVehicles and Shipments in Transit; Accidents177.854
Subpart ERegulations Applying to Hazardous Material on Motor Vehicles Carrying Passengers for Hire177.870
Part 178Specifications for Packagings178.1 – 178.1070
Part 179Specifications for Tank Cars179.1 – 179.500-18
Part 180Continuing Qualification and Maintenance of Packagings180.1 – 180.605
Parts 181-185 [Reserved]