47 CFR 73.6024 - Transmission standards and system requirements.
(b) A Class A TV station may continue to operate with the transmitter operated under its previous LPTV license, provided such operation does not cause any condition of uncorrectable interference due to radiation of radio frequency energy outside of the assigned channel. Such operation must continue to meet the requirements of §§ 74.736 and 74.750 of this chapter.
(c) A Class A TV station must meet the offset carrier frequency and frequency tolerance provisions of § 73.1545 of this part.
(d) A digital Class A station must meet the emission requirements of § 74.794 of this chapter.