In most cases, it’s not feasible to upgrade an LPFM station to a full-service NCE (Noncommercial Educational) station while keeping the same frequency or channel.
Yes, the FCC has the authority to grant waivers for minimum distance spacing requirements even when a full-power station operates on the same channel or the first adjacent channel. These waivers are typically considered on a case-by-case basis and are subject to specific regulatory conditions and considerations. Stations seeking such waivers should carefully follow FCC procedures and provide sufficient justification for the requested waiver. The FCC evaluates these requests with the goal of ensuring efficient spectrum use while minimizing interference and protecting existing broadcasters’ rights.
Indeed, LPFM stations can do so without any regulatory prohibition. Simultaneously broadcasting on full-service stations is allowed.