Class A TV stations must protect the TV service that would be provided by the facilities specified in the Table of TV Allotments in § 73.622(j) , by authorized TV stations, and by applications that propose to expand TV stations' allotted or authorized coverage contour in any direction. Protection of these allotments, stations, and applications must be based on meeting the requirements of § 74.793 (b) through (e) of this chapter. An application to change the facilities of a Class A TV station will not be accepted if it fails to protect these TV allotments, stations, and applications in accordance with this section.
47 C.F.R. §73.6018