47 CFR § 73.6017
Digital Class A TV station protection of Class A TV and digital Class A TV stations
February 16, 2021
An application for digital operation of an existing Class A TV station or to change the facilities of a digital Class A TV station will not be accepted if it fails to protect authorized Class A and digital Class A stations in accordance with the requirements of §74.793 (b) through (d) and §74.793(g) of this chapter. This protection must be afforded to applications for changes in other authorized Class A and digital Class A stations filed prior to the date the digital Class A application is filed.
[69 FR 69330, Nov. 29, 2004]