§ 90.281   Restrictions on operational fixed stations in the 421-430 MHz band.

   (a) Except for control stations, operational fixed facilities will not be
   authorized in the 421-430 MHz band. This does not preclude secondary fixed
   tone signaling and alarm operations authorized in § 90.235.

   (b) Control stations associated with one or more mobile relay stations will
   be  authorized only on the assigned frequency of the associated mobile
   station. Use of a mobile service frequency by a control station of a mobile
   relay system is subject to the condition that harmful interference shall not
   be caused to stations of licensees authorized to use the frequency for
   mobile service communications.

   [ 52 FR 6158 , Mar. 2, 1987, as amended at  54 FR 38681 , Sept. 20, 1989]

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