{"data":{"id":"us/14-cfr-253.9","jurisdiction":"us","citation":"14 CFR 253.9","heading":"Retroactive changes to contracts of carriage.","body":"An air carrier may not retroactively apply to persons who have already bought a ticket any material amendment to its contract of carriage that has significant negative implications for consumers.","path":["Title 14—Aeronautics and Space","CHAPTER II—OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS)","SUBCHAPTER A—ECONOMIC REGULATIONS","PART 253—NOTICE OF TERMS OF CONTRACT OF CARRIAGE"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"bb1060f671af7b47cbe8aa475665599fbc47d50263dd8f634841e4b4a256745a","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-253.8","next":"us/14-cfr-253.10"},"notice":"GroundRules: Original legal text. Not legal advice."}