2 U.S. Code § 61f–14 - Law enforcement authority of Sergeant-at-Arms and Doorkeeper of the Senate
(a) In general
The Sergeant-at-Arms and Doorkeeper of the Senate shall have the same law enforcement authority, including the authority to carry firearms, as a member of the Capitol Police. The law enforcement authority under the preceding sentence shall be subject to the requirement that the Sergeant-at-Arms and Doorkeeper of the Senate have the qualifications specified in subsection (b).
The qualifications referred to in subsection (a) are the following:
(1) A minimum of 5 years of experience as a law enforcement officer before beginning service as the Sergeant-at-Arms and Doorkeeper of the Senate.
(2) Current certification in the use of firearms by the appropriate Federal law enforcement entity or an equivalent non-Federal entity.