[Code of Federal Regulations] [Title 14, Volume 3] [Revised as of January 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR170.1] [Page 211] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 170_ESTABLISHMENT AND DISCONTINUANCE CRITERIA FOR AIR TRAFFIC CONTROL SERVICES AND NAVIGATIONAL FACILITIES--Table of Contents Subpart A_General Sec. 170.1 Scope. Subpart A_General Sec. 170.1 Scope. 170.3 Definitions. Subpart B_Airport Traffic Control Towers 170.11 Scope. 170.13 Airport Traffic Control Tower (ATCT) establishment criteria. 170.15 ATCT discontinuance criteria. Subpart C_LORAN-C 170.21 Scope. 170.23 LORAN-C establishment criteria. 170.25 LORAN-C discontinuance criteria. Authority: 49 U.S.C. 106(g), 40103-40107, 40113, 44502, 44701-44702, 44708-44709, 44719, 44721-44722, 46308. Source: 56 FR 341, Jan. 3, 1991, unless otherwise noted. This subpart sets forth establishment and discontinuance criteria for navigation aids operated and maintained by the United States.