(2)Notwithstanding anything contained in sub-section (1) of section 246, every appeal under this Act which is pending immediately before the appointed day, before the Deputy Commissioner (Appeals) and any matter arising out of or connected with such appeals and which is so pending shall stand transferred on that date to the Commissioner (Appeals) and the Commissioner (Appeals) may proceed with such appeal or matter from the stage at which it was on that day:Provided that the appellant may demand that before proceeding further with the appeal or matter, the previous proceeding or any part thereof be reopened or that he be re-heard.Explanation. - For the purposes of this section, "appointed day" means the day appointed by the Central Government by notification in the Official Gazette.