[Code of Federal Regulations] [Title 14, Volume 2] [Revised as of January 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR77.33] [Page 492] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 77_OBJECTS AFFECTING NAVIGABLE AIRSPACE--Table of Contents Subpart D_Aeronautical Studies of Effect of Proposed Construction on Navigable Airspace Sec. 77.33 Initiation of studies. (a) An aeronautical study is conducted by the FAA: (1) Upon the request of the sponsor or any construction or alteration for which a notice is submitted under subpart B of this part, unless that construction or alteration would be located within an antenna farm area established under subpart F of this part; or (2) Whenever the FAA determines it appropriate. [Doc. No. 1882, 30 FR 1839, Feb. 10, 1965, as amended by Amdt. 77-4, 32 FR 12997, Sept. 13, 1967]