One way that I see around that is rebroadcast on your Part 15 station an LPFM, college, etc. You´d be using their music license agreement, and add, what??? Maybe, a couple hundred more potential listeners, at most? A local LPFM appreciates me putting them on Part 15 AM where I am, where it´s a geographic dead-zone, for them. Lazy´casting, for me. They provide the programming and tunage, and I provide some extra coverage for them. A grey zone here? Eh... I´m not that worried.