Sec. 21.907  Transmission standards.

    (a) A licensee assigned a 6 MHz channel must be able to provide one 
type of monochrome and color television service which complies with the 
VHF transmission standards set forth in Sec. 73.682(a) of this chapter, 
except that the provision of Sec. 21.906(b) shall replace the 
requirements of Sec. 73.682(a)(14) of this chapter.
    (b) A licensee assigned a 4 MHz channel must be able to provide one 
type of monochrome and/or color television service which complies with 
VHF transmission standards set forth in Sec. 73.682(a) of this chapter, 
except that:
    (1) The provision of Sec. 21.906(b) shall replace the requirements 
of Sec. 73.682(a)(14) of this chapter, and
    (2) The requirements of Sec. 73.682 (a)(1), (a)(2), (a)(3), (a)(4), 
(a)(5), (a)(9), (a)(19),

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and (a)(20) of this chapter shall not apply.
    (c) In addition to the standard television transmission service 
specified in paragraphs (a) and (b) of this section, the licensee may 
offer a television service not meeting such standards if the tariff or 
contract clearly describes the type and quality of the service and 
distinguishes it from the standard service, and if the transmitter is 
type-accepted for such use.
    (d) For services other than television, a licensee may provide 
transmissions as described in the tariff or contract if the authorized 
bandwidth is not exceeded and the transmitter is type-accepted for such 
use.
    (e) In order to insure that transmitting information is not likely 
to be received in intelligible form by unauthorized subscribers or 
licensees, a licensee may vary the transmission standards specified in 
paragraphs (a), (b), and (c) of this section, provided that the encoded 
information is recoverable without perceptible degradation as compared 
to the same information transmitted in accordance with paragraphs (a), 
(b), and (c) of this section.
[ 52 FR 27556 , July 22, 1987]