14 C.F.R. § 300.11 Disqualification of Government officers and employees.
Title 14 - Aeronautics and Space
No officer or employee of the Federal Government, other than a “special Government employee” as defined in 18 U.S.C. 202, shall represent anyone, otherwise than in the proper discharge of his or her official duties, in any DOT proceeding or matter in which the United States is a party or has a direct and substantial interest. (18 U.S.C. 205)
Title 14: Aeronautics and Space
PART 300—RULES OF CONDUCT IN DOT PROCEEDINGS UNDER THIS CHAPTER
§ 300.11 Disqualification of Government officers and employees.
