Appellate Tribunal procedure: guided by natural justice, it may regulate its own procedure and exercise civil court powers in appeals. Appellate Tribunal procedure is governed by the principles of natural justice and the Tribunal may regulate its own procedure subject to the Act and rules. The Tribunal has specified civil court powers-including summoning and examining witnesses on oath, compelling discovery and production of documents, receiving affidavit evidence, requisitioning public records, issuing commissions, and dismissing or setting aside representation default orders-and its orders are enforceable as if decrees, with proceedings deemed judicial for specified penal and criminal procedure purposes.