Sec.  73.753   Antenna systems.

   All international broadcasting stations shall operate with directional
   antennas. Such antennas shall be designed and operated so that the radiated
   power in the maximum lobe toward the specific zone or area of reception
   intended to be served shall be at least 10 times the average power from the
   antenna in the horizontal plane. Radiation in all other directions shall be
   suppressed to the maximum extent technically feasible. In order to eliminate
   or mitigate harmful interference, the direction of the maximum lobe may be
   adjusted upon approval of the Commission.

   (Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154,
   155, 303))

   [ 38 FR 18895 , July 16, 1973, as amended at  44 FR 65765 , Nov. 15, 1979]