See if you can find out which tribe he is in. I know that my brother in law is Makah and they have restricted the season for the tribe in the last couple of years. . Still better then ours, but last I heard it was bull only, one per permit (they still can have designated hunters for certian members). I have never heard of him being able to hunt this early. Each tribe is different, but a quick call to the reservation enforcement would give you an answer. I think it is a bit early for most tribal hunts and would be surprised if he is allowed to bulls like that.