Concussion Type Headbands ???

[SC Official]

Originally Posted by Nevadaref

If it's truly for a medical reason, then the team/player won't have any problem getting an exemption from the state authority. Until that is granted, I, as the Referee, cannot allow the kid to participate BY RULE.

If that's the way that works for you or the way it's expected from your assigner/association, great. Here, the expectation for things like this (which pose zero safety issues whatsoever) is to play along and write a report afterwards. If they didn't cross every T and dot every I, the state can issue the disciplinary action.