47 CFR 80.76 - Requirements for land station control points.
Each coast or fixed station subject to this part must have the following facilities:
(a) Except for marine utility stations, a visual indication of antenna current; or a pilot lamp, meter or equivalent device which provides continuous visual indication whenever the transmitter control circuits have been actuated.
(b) Capability to aurally monitor all transmissions originating at dispatch points and to disconnect the dispatch points from the transmitter or to terminate the operation of the transmitter.
(c) Facilities which will permit the responsible operator to turn the carrier of the radio transmitter on and off at will.