§  17.2   Definitions.

   (a) Antenna structure. The term antenna structure means a structure
   that is constructed or used to transmit radio energy, or that is
   constructed or used for the primary purpose of supporting antennas to
   transmit and/or receive radio energy, and any antennas and other
   appurtenances mounted thereon, from the time construction of the
   supporting structure begins until such time as the supporting structure
   is dismantled.

   (b) Antenna farm area. A geographical location, with established
   boundaries, designated by the Federal Communications Commission, in
   which antenna structures 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 that
   is constructed or used to transmit radio energy, or the underlying
   antenna structure that supports or is intended to support antennas and
   other appurtenances. 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;  79 FR 56984 ,
   Sept. 24, 2014]