47 CFR § 73.6027
Class A TV notifications concerning interference to radio astronomy, research and receiving installations
February 16, 2021
An applicant for digital operation of an existing Class A TV station or to change the facilities of an existing Class A TV or digital Class A TV station shall be subject to the requirements of §73.1030—Notifications concerning interference to radio astronomy, research and receiving installations.
[69 FR 69331, Nov. 29, 2004]