CFR > Title 14 - Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER J—NAVIGATIONAL FACILITIES (parts 170 to 171) > PART 171—NON-FEDERAL NAVIGATION FACILITIES > SUBPART I—Interim Standard Microwave Landing System (ISMLS) (§171.251 to §171.275) > 171.251—Scope.

171.251—Scope.

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.