Appellate Tribunal procedure: guided by natural justice with civil court powers and decree enforcement authority in appellate proceedings. Section 111 confers procedural autonomy on the Appellate Tribunal, exempting it from strict adherence to the Code of Civil Procedure while requiring adherence to natural justice and enabling it to regulate its own procedure. It grants the Tribunal specified civil court powers-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 representations for default. Orders of the Tribunal are enforceable as civil decrees and proceedings are deemed judicial, with the Tribunal treated as a civil court for certain criminal procedure and penal provisions.