14 C.F.R. § 65.41 Skill requirements: Facility ratings.
Title 14 - Aeronautics and Space
Each applicant for a facility rating at an air traffic control tower must have passed a practical test on each item listed in §65.37 of this part that is applicable to each operating position at the control tower at which the rating is sought.
Title 14: Aeronautics and Space
PART 65—CERTIFICATION: AIRMEN OTHER THAN FLIGHT CREWMEMBERS
Subpart B—Air Traffic Control Tower Operators
§ 65.41 Skill requirements: Facility ratings.