Sec. 97.205  Repeater station.

    (a) Any amateur station licensed to a holder of a Technician, 
General, Advanced or Amateur Extra Class operator license may be a 
repeater. A holder of a Technician, General, Advanced or Amateur Extra 
Class operator license may be the control operator of a repeater, 
subject to the privileges of the class of operator license held.
    (b) A repeater may receive and retransmit only on the 10 m and 
shorter wavelength frequency bands except the 28.0-29.5 MHz, 50.0-51.0 
MHz, 144.0-144.5 MHz, 145.5-146.0 MHz, 222.00-222.15 MHz, 431.0-433.0 
Mhz, and 435.0-438.0 Mhz segments.
    (c) Where the transmissions of a repeater cause harmful interference 
to another repeater, the two station licensees are equally and fully 
responsible for resolving the interference unless the operation of one 
station is recommended by a frequency coordinator and the operation of 
the other station is not. In that case, the licensee of the non-
coordinated repeater has primary responsibility to resolve the 
interference.
    (d) A repeater may be automatically controlled.
    (e) Ancillary functions of a repeater that are available to users on 
the input channel are not considered remotely controlled functions of 
the station. Limiting the use of a repeater to only certain user 
stations is permissible.
    (f) [Reserved]
    (g) The control operator of a repeater that retransmits 
inadvertently communications that violate the rules in this part is not 
accountable for the violative communications.
    (h) The provisions of this paragraph do not apply to repeaters that 
transmit on the 1.2 cm or shorter wavelength bands. Before establishing 
a repeater within 16 km (10 miles) of the Arecibo Observatory or before 
changing the transmitting frequency, transmitter power, antenna height 
or directivity of an existing repeater, the station licensee must give 
notification thereof at least 20 days in advance of planned peration to 
the Interference Office, Arecibo Observatory, Post Office Box 995, 
Arecibo, Puerto Rico 00613, in writing or electronically, of the 
technical parameters of the proposal. Licensees who choose to transmit 
information electronically should e-mail to: prcz@naic.edu

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    (1) The notification shall state the geographical coordinates of the 
antenna (NAD-83 datum), antenna height above mean sea level (AMSL), 
antenna center of radiation above ground level (AGL), antenna 
directivity and gain, proposed frequency and FCC Rule Part, type of 
emission, effective radiated power, and whether the proposed use is 
itinerant. Licensees may wish to consult interference guidelines 
provided by Cornell University.
    (2) If an objection to the proposed operation is received by the FCC 
from the Arecibo Observatory, Arecibo, Puerto Rico, within 20 days from 
the date of notification, the FCC will consider all aspects of the 
problem and take whatever action is deemed appropriate. The licensee 
will be required to make reasonable efforts in order to resolve or 
mitigate any potential interference problem with the Arecibo 
Observatory.

[ 54 FR 25857 , June 20, 1989, as amended at  55 FR 4613 , Feb. 9, 1990;  56 FR 32517 , July 17, 1991;  58 FR 64385 , Dec. 7, 1993;  59 FR 18975 , Apr. 
21, 1994;  62 FR 55536 , Oct. 27, 1997;  63 FR 41205 , Aug. 3, 1998;  63 FR 68980 , Dec. 14, 1998;  69 FR 24997 , May 5, 2004]