K.M. Richards
Program Director, The Eighties Channel™
Have there been any exceptions granted to that limitation other than for KKHJ, which was allowed to return to KHJ for ... sanitary reasons?
That really wasn't the same situation. The then-owners of KKHJ petitioned to get the KHJ calls back on the same station. (I fuzzily recall that happening years earlier up in San Francisco). The exception was made not to the limitation I had cited but to the resurrection of a previously surrendered three-letter call.
In recent history, the KGB calls in San Diego were resurrected on 760 (the former KFMB) when the radio and television stations were sold to different owners. But in that case, the new owners of 760 also owned KGB-FM, which has the same city of license, and so the calls could be legally revived for the AM, even though it was not the original station that had them. In that case, it was the fact that KGB-FM had never changed calls which made the difference.