{"data":{"id":"us/14-cfr-171.251","jurisdiction":"us","citation":"14 CFR 171.251","heading":"Scope.","body":"This subpart sets forth minimum requirements for the approval and operation of non-Federal Interim Standard Microwave Landing System (ISMLS) facilities that are to be involved in the approval of instrument flight rules and air traffic control procedures related to those facilities.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER J—NAVIGATIONAL FACILITIES","PART 171—NON-FEDERAL NAVIGATION FACILITIES","Subpart I—Interim Standard Microwave Landing System (ISMLS)"],"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":"9a16b410b9c3d2da622b4fc7fa92406bed1e07b569706b59b39f234dbe7b7a49","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-171.213","next":"us/14-cfr-171.253"},"notice":"GroundRules: Original legal text. Not legal advice."}