Vested appellate rights protect pre-amendment GST penalty appeals from newly imposed pre-deposit conditions absent clear retrospective application.

A substituted proviso to Section 107(6) of the CGST Act, effective from 1 October 2025, requiring a ten per cent pre-deposit for appeals against penalty-only orders, is analysed as inapplicable to proceedings initiated through an earlier show-cause notice. The note explains that the right of appeal vests when the lis commences and includes the applicable appellate conditions. As the amendment imposes a new and burdensome filing condition without an express or necessarily implied transitional provision, appeals arising from pre-amendment notices remain governed by the earlier appellate regime, without a mandatory pre-deposit of disputed penalties.

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Issues: Whether the substituted proviso to Section 107(6) of the Central Goods and Services Tax Act, 2017, effective from 01.10.2025, requiring a ten per cent pre-deposit for appeals against penalty-only orders, applies to adjudicatory proceedings initiated by a show-cause notice before that date.

Analysis: The right of appeal is a substantive right that vests with the commencement of the lis and includes the appellate forum and conditions governing exercise of that right. A subsequently introduced pre-deposit that materially burdens access to the appellate remedy cannot apply to a vested appellate right unless the amending enactment expressly or by necessary implication so provides. The lis commenced when the show-cause notice asserted quantified personal penalty liability and required an answer; subsequent replies, hearing, adjudication order, and filing of appeal were connected stages of the same proceeding. The substituted proviso introduced, for the first time in respect of the penalty-only order concerned, a mandatory ten per cent deposit as a condition precedent to filing an appeal. Neither Section 129 of the Finance Act, 2025 nor the substituted proviso contains an express transitional command or necessary implication applying that onerous condition to proceedings initiated before its commencement. The expression "no appeal shall be filed" specifies the stage of compliance where the substituted proviso applies, but does not determine its temporal applicability to an already vested appellate right.

Conclusion: The substituted proviso to Section 107(6) does not apply to appeals arising from the pre-01.10.2025 show-cause notice; the appeals are governed by the pre-amendment appellate regime, and no ten per cent deposit of the disputed penalties is required as a condition of filing them. This is in favour of the assessee.

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