regional concentration rules
(2) For purposes of this subsection, the term “regional concentration rules” means the provisions of sections 73.35, 73.240, and 73.636 of title 47, Code of Federal Regulations (as in effect June 1, 1983 ), which prohibit any party from directly or indirectly owning, operating, or controlling three broadcast stations in one or several services where any two of such stations are within 100 miles of the third (measured city-to-city), and where there is a primary service contour overlap of any of the stations.