CFR › Title 49 › Part 215 › §215.12549 CFR §215.125Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkA railroad may not place or continue in service a car, if the car has an uncoupling device without sufficient vertical and lateral clearance to prevent—(a)Fouling on curves; or(b)Unintentional uncouplings.