Appellate Tribunal procedure: not bound by civil procedure, guided by natural justice and vested with civil court powers. Section 111 provides that the Appellate Tribunal, while not bound by the Code of Civil Procedure, shall be guided by principles of natural justice and may regulate its own procedure. It is vested with the same powers as a civil court for summoning witnesses, compelling document production, receiving affidavit evidence, requisitioning public records, issuing commissions and handling defaults; its orders are enforceable as if decrees and proceedings are deemed judicial proceedings.