150-250 words each. Must be original

1)  A court's judgment is binding on parties. But, what about ADR decisions?
Is an arbitrator's decision binding? Is a mediator's decision binding?
Or, are these things only binding once the parties agree to be bound by
them? Explain 150-200 words

2)  What happens when there is a conflict between laws.
For example, what if a statute gets passed that is contrary to the existing
common law?
Or, what happens when a federal law conflicts with a state law?  Explain
150-200 words