Sec. 73.759  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 location of main studio, if it is proposed to move the 
main studio to a different city from that specified in the license.

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    (e) Change in the power delivered to the antenna.
    (f) Change in frequency control and/or modulation system.
    (g) 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, ))

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