§  87.451   Licensing limitations.

   Operational fixed stations are subject to the following licensing
   limitations:

   (a) A maximum of four frequencies will be assigned.

   (b) Stations will not be authorized when applications indicate less
   than 16 km (10 miles) separation between a proposed station and a TV
   transmitter operating on either Channel 4 or 5, or from the post office
   of a community in which either channel is assigned but not in
   operation.

   (c) Stations located between 16 km (10 miles) and 128 km (80 miles) of
   a TV transmitter operating on either Channel 4 or 5, or from the post
   office of a community in which either channel is assigned but not in
   operation, are secondary to TV operations within the Grade B service
   contour.^1

   ^1 OET Bulletin No. 67, March 1988, entitled “Potential Interference
   from Operational Fixed Stations in the 72–76 MHz Band to Television
   Channels 4 and 5” describes an analytical model that can be used to
   calculate the potential interference that might result from a given
   fixed station operation. Copies of the bulletin may be obtained from
   the Commission's current duplication contractor. Information concerning
   the current duplication contractor may be obtained from the Office of
   Public Affairs, Consumer Assistance and Small Business Division,
   Telephone (202) 632–5050.

Subpart Q—Stations in the Radiodetermination Service