Clearing downlinks in specific areas??
How is that supposed to work? Surely most of the C band downlinks cover the whole US, and thus can't be "cleared" in specific areas.
I guess what they mean is that in certain areas where they want to use those frequencies, they pay anyone with a C band dish to use other means to receive their data, so they can have cell towers use those frequencies which will make C band reception with a dish impossible.
Good luck with that, the reason C band gets such use is because it is much more immune to rain outages than higher frequencies. I guess they can hope everyone using C band in a metro area can get the same thing via fiber, because they aren't going to consider a different satellite frequency at all equivalent.
I'll bet the FCC denies it anyway, there will be a lot of public comment against this scheme - even if you clear off current users once you allocate that frequency to cellular in a given area you also lock out all future possibility of receiving C band in that area. This sounds like a terrible idea, and should be shot down!