---
kind: "unit"
title: "50"
title_heading: "War and National Defense"
key: "ch20/schII"
level: "subchapter"
label: "Subchapter II"
heading: "Air Engineering Development Center"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/50/ch20-schII"
sections_count: 4
---

# Subchapter II — Air Engineering Development Center

Title 50 — War and National Defense › Chapter 20 — Wind Tunnels

## Sections

- [§521. Establishment; construction, maintenance, and operation of public works and wind tunnels](/usc/50/521.md)
- [§522. Acquisition of lands; advance payments for construction](/usc/50/522.md)
- [§523. Employment of civilian personnel](/usc/50/523.md)
- [§524. Authorization of appropriations](/usc/50/524.md)