{"data":{"id":"us/14-cfr-437.3","jurisdiction":"us","citation":"14 CFR 437.3","heading":"Definitions.","body":"Envelope expansion means any portion of a flight where planned operations will subject a reusable suborbital vehicle to the effects of altitude, velocity, acceleration, or burn duration that exceed a level or duration successfully verified during an earlier flight.\nExclusion area means an area, within an operating area, that a reusable suborbital vehicle's instantaneous impact point may not traverse.\nOperating area means a three-dimensional region where permitted flights may take place.\nPermitted vehicle means a reusable suborbital rocket or a reusable launch vehicle that will be launched into a suborbital trajectory or reentered that is operated by a launch or reentry operator under an experimental permit.\nReentry impact point means the location of a reusable suborbital vehicle's instantaneous impact point during its unpowered exoatmospheric suborbital flight.","path":["Title 14—Aeronautics and Space","CHAPTER III—COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—LICENSING","PART 437—EXPERIMENTAL PERMITS","Subpart A—General Information"],"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":"e3b07d31111fe08ce90650542bd8e62c90a2b3c0c8b039c5ae454485e718540f","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-437.1","next":"us/14-cfr-437.5"},"notice":"GroundRules: Original legal text. Not legal advice."}