15 CFR § 265.39 - Weapons and explosives.

---
identifier: "/us/cfr/t15/s265.39"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "15 CFR § 265.39 - Weapons and explosives."
title_number: 15
title_name: "Commerce and Foreign Trade"
section_number: "265.39"
section_name: "Weapons and explosives."
chapter_name: "NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE"
subchapter_number: "F"
subchapter_name: "REGULATIONS GOVERNING TRAFFIC AND CONDUCT"
part_number: "265"
part_name: "REGULATIONS GOVERNING TRAFFIC AND CONDUCT ON THE GROUNDS OF THE NATIONAL INSTITUTE OF STANDARDS & TECHNOLOGY, GAITHERSBURG, MARYLAND, AND BOULDER AND FORT COLLINS, COLORADO"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Sec. 9, 31 Stat. 1450, as amended (15 U.S.C. 277). Applies sec. 1, 72 Stat 1711, as amended, (15 U.S.C. 278e(b))."
regulatory_source: "39 FR 41170, Nov. 25, 1974, unless otherwise noted."
cfr_part: "265"
---


# 265.39 Weapons and explosives.

Except in connection with the conduct of official business on the site, no person other than uniformed guards specifically authorized, or other Federal, State, or local law enforcement officials so authorized, shall carry, transport, or otherwise possess on the site, firearms whether loaded or not, other dangerous or deadly weapons or materials, or explosives, either openly or concealed, without the written permission of the Director or his designee.