---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtB/chV/part552"
level: "part"
label: "Part 552"
heading: "Petitions for Rulemaking, Defect, and Noncompliance Orders"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtB-chV-part552"
sections_count: 15
---

# Part 552 — Petitions for Rulemaking, Defect, and Noncompliance Orders

Title 49 C.F.R. — Transportation › Subtitle B — Other Regulations Relating to Transportation › Chapter V — National Highway Traffic Safety Administration, Department of Transportation

## Contents

- [Subpart A — General](/cfr/49/subtB-chV-part552-subpartA.md)
- [Subpart B — Petitions for Expedited Rulemaking To Establish Dynamic Automatic Suppression System Test Procedures for Federal Motor Vehicle Safety Standard No. 208, Occupant Crash Protection](/cfr/49/subtB-chV-part552-subpartB.md)