§ 73.3556 Duplication of programming on commonly owned or time brokered stations.
(a) No commercial AM or FM radio
station shall operate so as to devote more than 25 percent of the total hours in its average broadcast week to programs that duplicate those of any
station in the same service (AM or FM) which is commonly owned or with which it has a time brokerage agreement if the principal community contours (predicted or measured 5 mV/m groundwave for AM
stations and predicted 3.16 mV/m for FM
stations) of the
stations overlap and the overlap constitutes more than 50 percent of the total principal community contour service area of either
station.
(b) For purposes of this section, duplication means the broadcasting of identical programs within any 24 hour period.