Sec. 87.143  Transmitter control requirements.

    (a) Each transmitter must be installed so that it is not accessible 
to, or capable of being operated by persons other than those authorized 
by the licensee.
    (b) Each station must be provided with a control point at the 
location of the transmitting equipment, unless otherwise specifically 
authorized. Except for aeronautical enroute stations governed by 
paragraph (e) of this section, a control point is the location at which 
the radio operator is stationed. It is the position at which the 
transmitter(s) can immediately be turned off.
    (c) Applicants for additional control points at aeronautical 
advisory (unicom) stations must specify the location of each proposed 
control point.
    (d) Except for aeronautical enroute stations governed by paragraph 
(f) of this section, the control point must have the following 
facilities installed:
    (1) A device that indicates when the transmitter is radiating or 
when the transmitter control circuits have been switched on. This 
requirement does not apply to aircraft stations;
    (2) Aurally monitoring of all transmissions originating at dispatch 
points;
    (3) A way to disconnect dispatch points from the transmitter; and
    (4) A way to turn off the transmitter.
    (e) A dispatch point is an operating position subordinate to the 
control point. Dispatch points may be installed without authorization 
from the Commission, and dispatch point operators are not required to be 
licensed.
    (f) In the aeronautical enroute service, the control point for an 
automatically controlled enroute station is the computer facility which 
controls the transmitter. Any computer controlled transmitter must be 
equipped to automatically shut down after 3 minutes of continuous 
transmission of an unmodulated carrier.