Sec.  21.110   Antenna polarization.

   

   Stations operating in the radio services included in this part are not
   limited as to the type of polarization of the radiated signal,
   provided, however, that in the event interference in excess of
   permissible levels is caused to the operation of other stations the
   Commission may, after notice and opportunity for hearing, order the
   licensee to change the polarization of the radiated signal. No change
   in polarization shall be made without prior authorization from the
   Commission.

   [ 52 FR 37783 , Oct. 9, 1987]