49 C.F.R. § 230.21 Steam locomotive number change.
Title 49 - Transportation
When a steam locomotive number is changed, the steam locomotive owner and/or operator must reflect the change in the upper right-hand corner of all documentation related to the steam locomotive by showing the old and new numbers: Old No. 000 New No. XXX.
Title 49: Transportation
PART 230—STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS
Subpart A—General
Recordkeeping Requirements
§ 230.21 Steam locomotive number change.
