49 C.F.R. § 236.104 Shunt fouling circuit.
Title 49 - Transportation
Shunt fouling circuit shall be inspected and tested at least once every three months.
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart A—Rules and Instructions: All Systems
Inspections and Tests; All Systems
§ 236.104 Shunt fouling circuit.
