49 C.F.R. § 229.63 Lateral motion.
Title 49 - Transportation
(a) Except as provided in paragraph (b), the total uncontrolled lateral motion between the hubs of the wheels and boxes, between boxes and pedestals or both, on any pair of wheels may not exceed 1 inch on non-powered axles and friction bearing powered axles, or (b) The total uncontrolled lateral motion may not exceed 1
Title 49: Transportation
PART 229—RAILROAD LOCOMOTIVE SAFETY STANDARDS
Subpart C—Safety Requirements
Suspension System
§ 229.63 Lateral motion.
