14 C.F.R. § 65.35 Knowledge requirements.
Title 14 - Aeronautics and Space
Each applicant for an air traffic control tower operator certificate must pass a written test on— (a) The flight rules in part 91 of this chapter: (b) Airport traffic control procedures, and this subpart: (c) En route traffic control procedures; (d) Communications operating procedures; (e) Flight assistance service; (f) Air navigation, and aids to air navigation; and (g) Aviation weather.
Title 14: Aeronautics and Space
PART 65—CERTIFICATION: AIRMEN OTHER THAN FLIGHT CREWMEMBERS
Subpart B—Air Traffic Control Tower Operators
§ 65.35 Knowledge requirements.