10 CFR § 1016.17
Protective personnel
June 9, 2020
Whenever armed protective personnel are required in accordance with §1016.15, such protective personnel shall:
(a) Possess a “Q” or “L” access authorization or “Q(X)” or “L(X)” access authorization if the Restricted Data being protected is classified Confidential, or a “Q” access authorization or “Q(X)” access authorization if the Restricted Data being protected is classified Secret.
(b) Be armed with sidearms of 9mm or greater.
[82 FR 41507, Sept. 1, 2017]