49 CFR §230.64
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The steam locomotive owner and/or operator shall take out of service at once any boiler that has developed a leak under the lagging due to a crack in the shell, or to any other condition which may reduce safety. Pursuant to § 230.29, the boiler must be repaired before being returned to service.