{"data":{"id":"us/49-cfr-236.739","jurisdiction":"us","citation":"49 CFR 236.739","heading":"Device, acknowledging.","body":"A manually operated electric switch or pneumatic valve by means of which, on a locomotive equipped with an automatic train stop or train control device, an automatic brake application can be forestalled, or by means of which, on a locomotive equipped with an automatic cab signal device, the sounding of the cab indicator can be silenced.","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 G—Definitions"],"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":"2f972b12aa9be4cc829609aa179f2a46d0999b792c3b0b9d3644422c7fdcd9ee","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-236.738","next":"us/49-cfr-236.740"},"notice":"GroundRules: Original legal text. Not legal advice."}