Sec.  5.77   Change in equipment and emission characteristics.

   (a)  A  change  may be made in a licensed transmitter without specific
   authorization from the Commission provided that the change does not result
   in operations inconsistent with any term of the outstanding authorization
   for the station involved.

   (b)  Discrete  changes in emission characteristics may be made without
   specific authorization from the Commission provided that the Commission is
   given written notification demonstrating that such changes will not exceed
   the maximum emissions envelope established in the existing authorization.
   Changes made pursuant to such notification that become a permanent part of
   the licensee's experimental program must be listed in the licensee's next
   application for renewal.

   (c) Prior authorization from the Commission is required before the following
   antenna changes may be made at a station at a fixed location:

   (1)  Any  change  that  will either increase the height of a structure
   supporting the radiating portion of the antenna or decrease the height of a
   lighted antenna structure.

   (2) Any change in the location of an antenna when such relocation involves a
   change in the geographic coordinates of latitude or longitude by as much as
   one second, or when such relocation involves a change in street address.