Sec. 74.551  Equipment changes.

    (a) Prior Commission approval, upon appropriate application (FCC 
Form 313) therefor, is required for any of the following changes:
    (1) A change in the ERP.
    (2) A change in the operating frequency or channel bandwidth.
    (3) A change in the location of the transmitter or transmitting 
antenna except when relocation of the transmitter is within the same 
building.
    (4) Any change in the overall height of the antenna structure, 
except where notice to the Federal Aviation Administration is 
specifically not required under Sec. 17.14(b) of this chapter.
    (5) Any change in the direction of the main radiation lobe of the 
transmitting antenna.
    (b) Other equipment changes not specifically referred to in this 
section may be made at the discretion of the licensee, provided that the 
FCC at Federal Communications Commission, Broadcast Auxiliary Radio 
Services, 1270 Fairfield Road, Gettysburg, Pennsylvania 17325 is 
promptly notified in writing upon the completion of such changes, and 
that the changes are described in the notification.
    (c) Any application proposing a change in the height of the antenna 
structure or its location must also include the Antenna Structure 
Registration Number (FCC Form 854R) of the antenna structure upon which 
it will locate its proposed antenna. In the event the antenna structure 
does not have a Registration Number, either the antenna structure owner 
shall file FCC Form 854 (``Application for Antenna Structure 
Registration'') in accordance with part 17 of this chapter or the 
applicant shall provide a detailed explanation why registration and 
clearance are not necessary.

[ 28 FR 13716 , Dec. 14, 1963, as amended at  38 FR 6827 , Mar. 13, 1973;  47 FR 54448 , Dec. 3, 1982;  49 FR 7130 , Feb. 27, 1984;  50 FR 48599 , Nov. 26, 
1985;  58 FR 19775 , Apr. 16, 1993;  61 FR 4368 , Feb. 6, 1996]