There are two different things. If a judge misapplies... I'll back up again.
Just as in any court, there are general rules about how the judge applies the law. In this case, the law is this act and the regulations made under this act later on. That is a significant point of control, because you have the policy oversight to make sure that the rules of the game are good.
Besides that, a judge can make a mistake. In the event that the judge has misapplied the law, which is what you'd be looking at, then all of these decisions would be subject to judicial review. The court has the ultimate authority, as is the case for any...