A physical on-air broadcast station, not a web stream? That likely violates a license; they're required to perform station identification on a regular basis.

Of course if they had on-site staff it wouldn't be an issue (worst case, just walk down to the transmitter hut and use the transmitter's aux input, which is there specifically for backup operations like this), but consolidation and enshittification of broadcast media mean there's probably nobody physically present.

Yeah, real over the air fm radio. This particular station is a Jack one owned by iHeart; they don't have DJs. Probably no techs or staff in the office overnight.