Sec.  17.2   Definitions.

   (a) Antenna structure. The term antenna structure includes the radiating
   and/or receive system, its supporting structures and any appurtenances
   mounted thereon.

   (b)  An  antenna farm area is defined as a geographical location, with
   established boundaries, designated by the Federal Communications Commission,
   in which antenna towers with a common impact on aviation may be grouped.

   (c) Antenna structure owner. For the purposes of this part, an antenna
   structure owner is the individual or entity vested with ownership, equitable
   ownership, dominion, or title to the antenna structure. Notwithstanding any
   agreements made between the owner and any entity designated by the owner to
   maintain the antenna structure, the owner is ultimately responsible for
   compliance with the requirements of this part.

   (d) Antenna structure registration number. A unique number, issued by the
   Commission during the registration process, which identifies an antenna
   structure. Once obtained, this number must be used in all filings related to
   this structure.

   [ 32 FR 8813 , June 21, 1967, and  32 FR 11268 , Aug. 3, 1967, as amended at  39 FR 26157 , July 17, 1974;  61 FR 4362 , Feb. 6, 1996]