---
kind: "unit"
title: "6"
title_heading: "Domestic Security"
key: "chI/part3"
level: "part"
label: "Part 3"
heading: "Petitions for Rulemaking"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/6/chI-part3"
sections_count: 5
---

# Part 3 — Petitions for Rulemaking

Title 6 C.F.R. — Domestic Security › Chapter I — Department of Homeland Security, Office of the Secretary

## Sections

- [§3.1. Definitions.](/cfr/6/3.1.md)
- [§3.3. Applicability.](/cfr/6/3.3.md)
- [§3.5. Format and mailing instructions.](/cfr/6/3.5.md)
- [§3.7. Content of a rulemaking petition.](/cfr/6/3.7.md)
- [§3.9. Responding to a rulemaking petition.](/cfr/6/3.9.md)