---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtB/chI/subchC/part171"
level: "part"
label: "Part 171"
heading: "General Information, Regulations, and Definitions"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtB-chI-subchC-part171"
sections_count: 24
---

# Part 171 — General Information, Regulations, and Definitions

Title 49 C.F.R. — Transportation › Subtitle B — Other Regulations Relating to Transportation › Chapter I — Pipeline and Hazardous Materials Safety Administration, Department of Transportation › Subchapter C — Hazardous Materials Regulations

## Contents

- [Subpart A — Applicability, General Requirements, and North American Shipments](/cfr/49/subtB-chI-subchC-part171-subpartA.md)
- [Subpart B — Incident Reporting, Notification, BOE Approvals and Authorization](/cfr/49/subtB-chI-subchC-part171-subpartB.md)
- [Subpart C — Authorization and Requirements for the Use of International Transport Standards and Regulations](/cfr/49/subtB-chI-subchC-part171-subpartC.md)