28 U.S.C. § 568Section
§ 568. Practice of law prohibited
A United States marshal or deputy marshal may not practice law in any court of the United States.
(Added Pub. L. 89–554, §4(c), Sept. 6, 1966, 80 Stat. 621, §575; renumbered §568, Pub. L. 100–690, title VII, §7608(a)(2)(B), Nov. 18, 1988, 102 Stat. 4514.)