2 U.S.C. § 6621
Payment for telecommunications equipment and services; definitions
As used in sections 6621 to 6623 of this title, the term—
(1)
“Sergeant at Arms” means the Sergeant at Arms and Doorkeeper of the United States Senate; and
(2)
“user” means any Senator, Officer of the Senate, Committee, office, or entity provided telephone equipment and services by the Sergeant at Arms.
( Pub. L. 100–123, § 1 , Oct. 5, 1987 , 101 Stat. 794 .)