---
kind: "unit"
title: "50"
title_heading: "War and National Defense"
key: "ch44/schIV"
level: "subchapter"
label: "Subchapter IV"
heading: "Protection of Certain National Security Information"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/50/ch44-schIV"
sections_count: 6
---

# Subchapter IV — Protection of Certain National Security Information

Title 50 — War and National Defense › Chapter 44 — National Security

## Sections

- [§3121. Protection of identities of certain United States undercover intelligence officers, agents, informants, and sources](/usc/50/3121.md)
- [§3122. Defenses and exceptions](/usc/50/3122.md)
- [§3123. Repealed.](/usc/50/3123.md)
- [§3124. Extraterritorial jurisdiction](/usc/50/3124.md)
- [§3125. Providing information to Congress](/usc/50/3125.md)
- [§3126. Definitions](/usc/50/3126.md)