{"data":{"id":"us/49-cfr-236.4","jurisdiction":"us","citation":"49 CFR 236.4","heading":"Interference with normal functioning of device.","body":"The normal functioning of any device shall not be interfered with in testing or otherwise without first taking measures to provide for safety of train operation which depends on normal functioning of such device.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 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"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"c3194a1e261c6df8302d75c352fec2f333009bd13b83d508d10fc0e53069815c","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-236.3","next":"us/49-cfr-236.5"},"notice":"GroundRules: Original legal text. Not legal advice."}