Sec.  17.17   Existing structures.

   (a) The requirements found in  Sec. 17.23 relating to painting and lighting of
   antenna structures shall not apply to those structures authorized prior to
   July 1, 1996. Previously authorized structures may retain their present
   painting and lighting specifications, so long as the overall structure
   height or site coordinates do not change. The Antenna Structure Registration
   requirements found in  Sec. 17.5, however, shall apply to all antenna structures
   that have been assigned painting or lighting requirements by the Commission,
   regardless of prior authorization.

   (b) No change in any of these criteria or relocation of airports shall at
   any time impose a new restriction upon any then existing or authorized
   antenna structure or structures.

   [ 32 FR 11269 , Aug. 3, 1967, as amended at  61 FR 4363 , Feb. 6, 1996]

Subpart C—Specifications for Obstruction Marking and Lighting of Antenna
Structures