---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtB/chXII"
level: "chapter"
label: "Chapter XII"
heading: "Transportation Security Administration, Department of Homeland Security"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtB-chXII"
sections_count: 355
---

# Chapter XII — Transportation Security Administration, Department of Homeland Security

Title 49 C.F.R. — Transportation › Subtitle B — Other Regulations Relating to Transportation

## Contents

- [Subchapter A — Administrative and Procedural Rules](/cfr/49/subtB-chXII-subchA.md)
- [Subchapter B — Security Rules for All Modes of Transportation](/cfr/49/subtB-chXII-subchB.md)
- [Subchapter C — Civil Aviation Security](/cfr/49/subtB-chXII-subchC.md)
- [Subchapter D — Maritime and Surface Transportation Security](/cfr/49/subtB-chXII-subchD.md)