§ 73.761   Modification of transmission systems.

   Specific authority, upon filing formal application (FCC Form 309)
   therefor, is required for any of the following changes:

   (a) Change involving an increase or decrease in the power rating of the
   transmitters.

   (b) A replacement of the transmitters as a whole.

   (c) Change in the location of the transmitting antenna.

   (d) Change in the power delivered to the antenna.

   (e) Change in frequency control and/or modulation system.

   (f) Change in direction or gain of antenna system.

   Other changes, not specified above in this section, may be made at any
   time without the authority of the Commission: Provided, That the
   Commission shall be immediately notified thereof and such changes shall
   be shown in the next application for renewal of license.

   (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.
   Redesignated at  70 FR 46677 , Aug. 10, 2005, as amended at  82 FR 57882 ,
   Dec. 8, 2017]

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