Sec.  74.550   Equipment authorization.

   Each authorization for aural broadcast STL, ICR, and booster stations shall
   require  the use of equipment which has been certificated or verified.
   Equipment which has not been approved under the equipment authorization
   program and which was in service prior to July 1, 1993, may be retained
   solely for temporary uses necessary to restore or maintain regular service
   provided by approved equipment, because the main or primary unit has failed
   or requires servicing. Such temporary uses may not interfere with or impede
   the establishment of other aural broadcast auxiliary links and may not occur
   during more than 720 cumulative hours per year. Should interference occur,
   the  licensee must take all steps necessary to eliminate it, up to and
   including  cessation  of  operation  of the auxiliary transmitter. All
   unapproved  equipment retained for temporary use must have been in the
   possession of the licensee prior to July 1, 1993, and may not be obtained
   from other sources. Equipment designed exclusively for fixed operation shall
   be authorized under the verification procedure. The equipment authorization
   procedures are contained in subpart J of part 2 of the rules.

   Note to  Sec. 74.550: Consistent with the note to  Sec. 74.502(a), grandfathered
   equipment in the 942–944 MHz band and STL/ICR users of these frequencies in
   Puerto Rico are also required to come into compliance by July 1, 1993. The
   backup provisions described above apply to these stations also.

   [ 63 FR 36604 , July 7, 1998]