Sec. 74.1251  Technical and equipment modifications.

    (a) No change, either mechanical or electrical, except as provided 
in Sec. 2.1001 of this chapter, may be made in FM translator or booster 
apparatus which has been type accepted by the Commission without prior 
authority of the Commission.

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    (b) Formal application on FCC Form 349 is required of all permittees 
and licensees for any of the following changes:
    (1) Replacement of the transmitter as a whole, except replacement 
with a transmitter of identical power rating which has been type 
accepted by the FCC for use by FM translator or FM booster stations, or 
any change which could result in the electrical characteristics or 
performance of the station. Upon the installation or modification of the 
transmitting equipment for which prior FCC authority is not required 
under the provisions of this paragraph, the licensee shall place in the 
station records a certification that the new installation complies in 
all respects with the technical requirements of this part and the terms 
of the station authorization.
    (2) A change in the transmitting antenna system, including the 
direction of radiation or directive antenna pattern.
    (3) 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.
    (4) Any change in the location of the translator or booster except a 
move within the same building or upon the same pole or tower.
    (5) Any horizontal change in the location of the antenna structure 
which would (i) be in excess of 152.4 meters (500 feet), or (ii) would 
require notice to the Federal Aviation Administration pursuant to 
Sec. 17.7 of the FCC's rules.
    (6) Any change of input or output frequency of a translator.
    (7) Any change of authorized effective radiated power.
    (8) Any change in area being served.
    (c) Changes in the primary FM station being retransmitted must be 
submitted to the FCC in writing.
    (d) 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 proposes to locate its 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 required.

[ 35 FR 15388 , Oct. 2, 1970, as amended at  45 FR 26068 , Apr. 17, 1980;  47 FR 24580 , June 7, 1982;  50 FR 3525 , Jan. 25, 1985;  50 FR 23710 , June 5, 
1985;  55 FR 50698 , Dec. 10, 1991;  61 FR 4368 , Feb. 6, 1996]