10 CFR § 37.3 - Scope.

---
identifier: "/us/cfr/t10/s37.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 37.3 - Scope."
title_number: 10
title_name: "Energy"
section_number: "37.3"
section_name: "Scope."
chapter_name: "NUCLEAR REGULATORY COMMISSION"
part_number: "37"
part_name: "PHYSICAL PROTECTION OF CATEGORY 1 AND CATEGORY 2 QUANTITIES OF RADIOACTIVE MATERIAL"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Atomic Energy Act of 1954, secs. 11, 53, 81, 103, 104, 147, 148, 149, 161, 182, 183, 223, 234, 274 (42 U.S.C. 2014, 2073, 2111, 2133, 2134, 2167, 2168, 2169, 2201, 2232, 2233, 2273, 2282, 2021); Energy Reorganization Act of 1974, secs. 201, 202 (42 U.S.C. 5841, 5842); 44 U.S.C. 3504 note."
regulatory_source: "78 FR 17007, Mar. 19, 2013, unless otherwise noted."
cfr_part: "37"
---


# 37.3 Scope.

(a) Subparts B and C of this part apply to any person who, under the regulations in this chapter, possesses or uses at any site, an aggregated category 1 or category 2 quantity of radioactive material.

(b) Subpart D of this part applies to any person who, under the regulations of this chapter:

(1) Transports or delivers to a carrier for transport in a single shipment, a category 1 or category 2 quantity of radioactive material; or

(2) Imports or exports a category 1 or category 2 quantity of radioactive material; the provisions only apply to the domestic portion of the transport.