Sec. 78.109  Equipment changes.

    (a) Formal application is required for any of the following changes:
    (1) Any increase in emission bandwidth beyond that authorized;
    (2) Any change in the transmitting antenna system of a station, 
other than a CARS pickup station, including the direction of the main 
radiation lobe, directive pattern, antenna gain or transmission line;
    (3) Any horizontal change in the location of the antenna, other than 
a CARS pickup station, transmitter.
    (4) Any change in the type of modulation;
    (5) Any change in the location of a station transmitter, other than 
a CARS pickup station transmitter, except a move within the same 
building or upon the tower or mast or a change

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in the area of operation of a CARS pickup station.
    (6) Any change in frequency assignment, including polarization;
    (7) Any change in authorized operating power.
    (b) Other equipment changes not specifically referred to in 
paragraph (a) of this section may be made at the discretion of the 
licensee, provided that the Engineer in Charge of the radio district in 
which the station is located and the Commission in Washington, DC, are 
notified in writing upon the completion of such changes and provided 
further, that the changes are appropriately reflected in the next 
application for renewal of licenses of the station.
    (c) Any application proposing a change in the height of the antenna 
structure or its location shall include the Antenna Structure 
Registration Number (FCC Form 854R) of the structure upon which it 
proposes to locate its antenna. In the event the antenna structure does 
not have a Registration Number, the owner of the antenna structure shall 
file an FCC Form 854 (``Application for Antenna Structure 
Registration'') in accordance with part 17 of this chapter or the 
applicant shall provide a detailed explanation as to why registration 
and clearance are not required.

[ 37 FR 3292 , Feb. 12, 1972, as amended at  38 FR 6827 , Mar. 3, 1973;  41 FR 29696 , July 19, 1976;  61 FR 4368 , Feb. 6, 1996]