[Ref in PA]

I have said this before ... your sons are stuck the refs and their rules knowledge for the entire game. The rules knowledge of the refs will not improve during the game and may not improve before the next game. Understanding that fact will help them cope with any misapplication of any rule. If there is blatant misapplication of a rule, some refs might listen to a respectful question, but most I know will not. Your sons are going to have to read the personality of the refs on the game to know if they can be approached or not with a question.