14 C.F.R. § 23.671 General.
Title 14 - Aeronautics and Space
(a) Each control must operate easily, smoothly, and positively enough to allow proper performance of its functions. (b) Controls must be arranged and identified to provide for convenience in operation and to prevent the possibility of confusion and subsequent inadvertent operation.
Title 14: Aeronautics and Space
PART 23—AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Subpart D—Design and Construction
Control Systems
§ 23.671 General.
