§  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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