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, ))

[38 303 FR 18895 , July 16, 1973, as amended at  44 FR 65765 , Nov. 15, 1979]