Sec. 73.665  Use of TV aural baseband subcarriers.

    Licensees of TV broadcast stations may transmit, without further 
authorization from the FCC, subcarriers and signals within the composite 
baseband for the following purposes:
    (a) Stereophonic (biphonic, quadraphonic, etc.) sound programs under 
the provisions of Secs. 73.667 and 73.669.
    (b) Transmission of signals relating to the operation of TV 
stations, such as relaying broadcast materials to other stations, remote 
cueing and order messages, and control and telemetry signals for the 
transmitting system.
    (c) Transmission of pilot or control signals to enhance the 
station's program service such as (but not restricted to) activation of 
noise reduction decoders in receivers, for any other receiver control 
purpose, or for program alerting and program identification.

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    (d) Subsidiary communications services.

[ 49 FR 18105 , Apr. 27, 1984]