49 CFR 229.63 - Lateral motion.
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(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 3/4 inch on all other powered axles.
Title 49 published on 2013-10-01
no entries appear in the Federal Register after this date.