§ 73.3550 Requests for new or modified call sign assignments.
(m) Where a requested call sign, without the “-FM,' “-TV,” “-CA” or “LP” suffix, would conform to the call sign of any other non-commonly owned station(s) operating in a different service, an applicant utilizing the on-line reservation and authorization system will be required to certify that consent to use the secondary call sign has been obtained from the holder of the primary call sign.
In other words, they would have to get permission from Alpha to use the call KUFO-FM.
Alpha could even make them pay big $$ for it.