{"data":{"id":"us/14-cfr-121.4","jurisdiction":"us","citation":"14 CFR 121.4","heading":"Applicability of rules to unauthorized operators.","body":"The rules in this part which refer to a person certificated under part 119 of this chapter apply also to any person who engages in an operation governed by this part without the appropriate certificate and operations specifications required by part 119 of this chapter.","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 A—General"],"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":"bbb3caf06e4ab829729818552458aaaaacbe5650f776f0d0183446059380d251","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.2","next":"us/14-cfr-121.7"},"notice":"GroundRules: Original legal text. Not legal advice."}