Section 107(6)'s substituted proviso, requiring a ten per cent...

Section 107(6)'s substituted proviso, requiring a ten per cent pre-deposit for penalty-only appeals, does not apply where a formal show-cause notice commenced adjudication before 1 October 2025. The High Court treated the right of appeal and its associated conditions as substantive and vested when the lis begins. Because the new filing-stage deposit may bar access to the appellate forum, it is an onerous condition rather than merely procedural. In the absence of express retrospective operation or necessary intendment, appeals from pre-amendment proceedings remain governed by the earlier regime, while admitted amounts remain payable. The Appellate Authority has no inherent power to waive an applicable mandatory deposit.