---
kind: "unit"
title: "6"
title_heading: "Domestic Security"
key: "chI/part29"
level: "part"
label: "Part 29"
heading: "Protected Critical Infrastructure Information"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/6/chI-part29"
sections_count: 9
---

# Part 29 — Protected Critical Infrastructure Information

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

## Sections

- [§29.1. Purpose and scope.](/cfr/6/29.1.md)
- [§29.2. Definitions.](/cfr/6/29.2.md)
- [§29.3. FOIA exemptions and restrictions on use of PCII.](/cfr/6/29.3.md)
- [§29.4. PCII Program administration.](/cfr/6/29.4.md)
- [§29.5. Requirements for protection.](/cfr/6/29.5.md)
- [§29.6. Acknowledgment of receipt, validation, and marking.](/cfr/6/29.6.md)
- [§29.7. Safeguarding of PCII.](/cfr/6/29.7.md)
- [§29.8. Disclosure of PCII.](/cfr/6/29.8.md)
- [§29.9. Investigation and reporting of violation of PCII procedures.](/cfr/6/29.9.md)