Are questions regarding quasi-judicial bodies, such as arbitration, on-topic?
I would say yes, especially in light of laws like the FAA. I don't see any downsides to allowing the questions.
I believe that questions about QUASI-judicial bodies should be on topic.
There are three basic kinds of law; statutory law (legislatures), case law (courts), and administrative law (executive branch). The third group makes "law" even though it is less widely followed than the other two kinds of law.