This came up last night

Don't have my books here, but I don't think there's actually a rule in the book that would cover it. There are references to "responsible adult" in several areas, for example, an ejected player should not be sent to the locker room without a responsible adult (and if I'm wrong, I apologize profusely). I think it would have to go state by state on how it's handled. Of course, that would vary quite a bit, depending on the qualifications to coach in each state, etc. etc.

By the way Josh, Iowa requires either a teacher's certificate or a coach's certificate. In Nebraska, it's a teacher's certificate. In Nebraska, non-teachers can coach by getting a teacher's certificate that is a provisional trades certificate. Don't even ask. I think it's the utmost ridiculous thing I've ever heard of, lumping coaching wannabes in with the guys who teach automotive or woodshop.