§ 5.77   Change in equipment and emission characteristics.

   (a) The licensee of a conventional or broadcast experimental radio station
   may make any changes in equipment that are deemed desirable or necessary
   provided:

   (1) That the operating frequency is not permitted to deviate more than the
   allowed tolerance;

   (2) That the emissions are not permitted outside the authorized band;

   (3) That the ERP (or EIRP) and antenna complies with the license and the
   regulations governing the same; and

   (b) For conventional experimental radio stations, the changes permitted in
   paragraph (a) of this section may be made without prior authorization from
   the Commission provided that the license supplements its application file
   with a description of such change. If the licensee wants these emission
   changes  to become a permanent part of the license, an application for
   modification must be filed.

   (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 one second
   or more, or when such relocation involves a change in street address.

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