[Code of Federal Regulations] [Title 14, Volume 2] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR77.51] [Page 493] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 77_OBJECTS AFFECTING NAVIGABLE AIRSPACE--Table of Contents Subpart E_Rules of Practice for Hearings Under Subpart D Sec. 77.51 Parties to the hearing. The presiding officer designates the following as parties to the hearing-- (a) The proponent of the proposed construction or alteration. (b) Those persons whose activities would be substantially affected by the proposed construction or alteration.