---
kind: "unit"
title: "50"
title_heading: "War and National Defense"
key: "ch4A"
level: "chapter"
label: "Chapter 4A"
heading: "Photographing, Sketching, Mapping, Etc., Defensive Installations"
release: "119-102"
url: "https://uscodex.org/usc/50/ch4A"
sections_count: 1
---

# Chapter 4A — Photographing, Sketching, Mapping, Etc., Defensive Installations

Title 50 — War and National Defense

## Sections

- [§45...45d. Repealed.](/usc/50/45...45d.md)