§ 73.669   TV stereophonic aural and multiplex subcarrier operation.

   (a) A TV broadcast station may without specific authority from the FCC,
   transmit multichannel aural programs upon installation of multichannel
   sound equipment. Prior to commencement of multichannel broadcasting,
   the equipment shall be measured in accordance with § 73.1690(e).

   (b) Multiplex subcarriers may be used by a TV station pursuant to the
   provisions of § 73.665 and may be transmitted on a secondary,
   non-interference basis to broadcast programming without specific
   authority from the FCC. Transmissions must be conducted in accordance
   with the technical standards given in § 73.682(c).

   (c) In all arrangements entered into with outside parties affecting
   non-common carrier subcarrier operation, the licensee or permittee must
   retain control over all material transmitted over the station's
   facilities, with the right to reject any material which is deemed
   inappropriate or undesirable. Subchannel leasing arrangements must be
   kept in writing at the station and made available to the FCC upon
   request.

   [ 49 FR 18106 , Apr. 27, 1984]

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