Appellate tribunal procedure: guided by natural justice with civil court powers to summon, examine, and enforce orders. The Appellate Tribunal shall be guided by principles of natural justice and may regulate its own procedure, but shall not be bound by the Code of Civil Procedure; it has civil court powers to summon and examine witnesses on oath, require discovery and production of documents, receive affidavit evidence, requisition public records subject to evidence law, issue commissions, dismiss or set aside dismissals for default, and exercise other prescribed powers, with its orders enforceable as civil court decrees and proceedings treated as judicial for specified penal and criminal procedure purposes.