Coach/ board member/ parent / commissioner - how many hats can one person ethically wear?

We live in a relatively small town. The Recreation Board consists primarily of people who are coaches, and parents. The Rec Board also selects one board member to be a "commisioner" to make sure rules are followed and to manage any disputes that come up. So, the commissioner is a coach, a parent, and a Board Member - all at the same time. The There does not seem to be a good system of "checks and balances" to ensure neutrality / impartiality. How are other communities dealing with these type of situations? Particularly when there is no money to hire a neutral party.