49 C.F.R. § 215.127 Defective draft arrangement.
Title 49 - Transportation
A railroad may not place or continue in service a car, if— (a) The car has a draft gear that is inoperative; (b) The car has a broken yoke; (c) An end of car cushioning unit is— (1) Leaking clearly formed droplets; or (2) Inoperative; (d) A vertical coupler pin retainer plate— (1) Is missing (except by design); or (2) Has a missing fastener; (e) The car has a draft key, or draft key retainer, that is— (1) Inoperative; or (2) Missing; or (f) The car has a missing or broken follower plate.
Title 49: Transportation
PART 215—RAILROAD FREIGHT CAR SAFETY STANDARDS
Subpart B—Freight Car Components
Draft System
§ 215.127 Defective draft arrangement.