10 CFR § 1017.23 - Protection in use.

---
identifier: "/us/cfr/t10/s1017.23"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 1017.23 - Protection in use."
title_number: 10
title_name: "Energy"
section_number: "1017.23"
section_name: "Protection in use."
chapter_name: "DEPARTMENT OF ENERGY (GENERAL PROVISIONS)"
part_number: "1017"
part_name: "IDENTIFICATION AND PROTECTION OF UNCLASSIFIED CONTROLLED NUCLEAR INFORMATION"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7101  50 U.S.C. 2401  42 U.S.C. 2168; 28 U.S.C. 2461 note."
regulatory_source: "73 FR 32641, June 10, 2008, unless otherwise noted."
cfr_part: "1017"
---


# 1017.23 Protection in use.

An Authorized Individual or a person granted limited access to UCNI under § 1017.21 must maintain physical control over any document or material marked as containing UCNI that is in use to prevent unauthorized access to it.