14 C.F.R. § 77.51 Parties to the hearing.
Title 14 - Aeronautics and Space
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.
Title 14: Aeronautics and Space
PART 77—OBJECTS AFFECTING NAVIGABLE AIRSPACE
Subpart E—Rules of Practice for Hearings Under Subpart D
§ 77.51 Parties to the hearing.