(7)For the purposes of this section,—(a)"appellate authority" means the Joint Commissioner (Appeals) or the Commissioner (Appeals) or the Appellate Tribunal;(b)"case", in relation to an assessee, means any proceeding under this Act for the assessment of the total income of the assessee or for the imposition of any penalty or fine on him; and(c)"subsequent appeal before a higher forum" means the appeal before the High Court under section 365 or appeal before the Supreme Court under section 367 or in a Special Leave Petition under article 136 of the Constitution, against the order of the Appellate Tribunal or the jurisdictional High Court.