14 C.F.R. § 23.55 Accelerate-stop distance.
Title 14 - Aeronautics and Space
For each commuter category airplane, the accelerate-stop distance must be determined as follows: (a) The accelerate-stop distance is the sum of the distances necessary to— (1) Accelerate the airplane from a standing start to VEF with all engines operating; (2) Accelerate the airplane from VEF to V1, assuming the critical engine fails at VEF; and (3) Come to a full stop from the point at which V1 is reached. (b) Means other than wheel brakes may be used to determine the accelerate-stop distances if that means— (1) Is safe and reliable; (2) Is used so that consistent results can be expected under normal operating conditions; and (3) Is such that exceptional skill is not required to control the airplane. [Amdt. 23–34, 52 FR 1826, Jan. 15, 1987, as amended by Amdt. 23–50, 61 FR 5185, Feb. 9, 1996]
Title 14: Aeronautics and Space
PART 23—AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES
Subpart B—Flight
Performance
§ 23.55 Accelerate-stop distance.

