14 C.F.R. § 25.1503 Airspeed limitations: general.
Title 14 - Aeronautics and Space
When airspeed limitations are a function of weight, weight distribution, altitude, or Mach number, limitations corresponding to each critical combination of these factors must be established.
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart G—Operating Limitations and Information
Operating Limitations
§ 25.1503 Airspeed limitations: general.