The FCC is fine with moving existing three-letter calls around, so long as they stay in their existing markets and with their existing owners. CBS had no issue creating a new WBZ-FM or WJZ(AM)/WJZ-FM in the 2000s. KFH in Wichita was moved from one AM to another in Wichita, and same with WHB in Kansas City. So that's not really an issue if Cox wants to try doing it.
And whatever the letter of 73.1201 might say, the FCC isn't writing violations against any of the many stations that say "WXXX AM and FM Anytown" instead of "WXXX, WXXX-FM Anytown." And there are LOTS of those.
And whatever the letter of 73.1201 might say, the FCC isn't writing violations against any of the many stations that say "WXXX AM and FM Anytown" instead of "WXXX, WXXX-FM Anytown." And there are LOTS of those.