{"data":{"id":"us/49-cfr-235.5","jurisdiction":"us","citation":"49 CFR 235.5","heading":"Changes requiring filing of application.","body":"(a) Except as provided in § 235.7, applications shall be filed to cover the following:\n(1) The discontinuance of a block signal system, interlocking, traffic control system, automatic train stop, train control, or cab signal system or other similar appliance or device;\n(2) The decrease of the limits of a block signal system, interlocking, traffic control system, automatic train stop, train control, or cab signal system; or\n(3) The modification of a block signal system, interlocking, traffic control system, automatic train stop, train control, or cab signal system.\n(b) [Reserved]","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 235—INSTRUCTIONS GOVERNING APPLICATIONS FOR APPROVAL OF A DISCONTINUANCE OR MATERIAL MODIFICATION OF A SIGNAL SYSTEM OR RELIEF FROM THE REQUIREMENTS OF PART 236"],"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":"52c2b1017c39092d8f0acfa236795448daf8ce77fe00768ede3d050da7ce5d61","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-235.3","next":"us/49-cfr-235.6"},"notice":"GroundRules: Original legal text. Not legal advice."}