14 C.F.R. § 25.235 Taxiing condition.
Title 14 - Aeronautics and Space
The shock absorbing mechanism may not damage the structure of the airplane when the airplane is taxied on the roughest ground that may reasonably be expected in normal operation.
Title 14: Aeronautics and Space
PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES
Subpart B—Flight
Ground and Water Handling Characteristics
§ 25.235 Taxiing condition.