49 C.F.R. § 230.44 Time of testing.
Title 49 - Transportation
Steam gauges shall be tested prior to being installed or being reapplied, during the 92 service day inspection, and whenever any irregularity is reported.
Title 49: Transportation
PART 230—STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS
Subpart B—Boilers and Appurtenances
Steam Gauges
§ 230.44 Time of testing.