Withdrawal of appeal: appellant may withdraw before final order; Tribunal approval required if acknowledged, decided in 15 days. An appellant may apply to withdraw an appeal at any time before the order under sub-section (2) of section 30 is issued; if an acknowledgement was issued, withdrawal requires Appellate Tribunal approval and must be decided within fifteen days, and any fresh appeal must be filed within the period specified in sub-section (1) of section 30 of the Act.