{"data":{"id":"us/14-cfr-121.538","jurisdiction":"us","citation":"14 CFR 121.538","heading":"Aircraft security.","body":"Certificate holders conducting operations under this part must comply with the applicable security requirements in 49 CFR chapter XII.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER G—AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS","PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS","Subpart T—Flight Operations"],"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":"9fc67ea9421195e803ec0e951d4b9adda687d06e263a261ce4069308d7e94875","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.537","next":"us/14-cfr-121.539"},"notice":"GroundRules: Original legal text. Not legal advice."}