In the case of the local broadcasters, the FCC requirement is for carriage of only the main signal. This is very significant in the digital age since the local broadcasters can easily now carry 3, 4, or 5 signals in their allotted space. Many locals are now carrying one of the big 4, plus CW or MyTv, and a weather channel, and would like to force Dish, DirecTv, and the local cable companies to carry all three, four, or five signals. And each additional carried signal deteriorates the quality of the primary signal.
Regards,
Fitzie