Appeal procedure in customs law governs tiers of appeal, mandatory pre-deposit with discretionary waiver, and settlement avenue. The Customs Act provides a multi-tier appeal and review scheme: appeals from subordinate officers go to the Commissioner (Appeals), appeals from Commissioners and Commissioner (Appeals) go to the Appellate Tribunal, with certain exclusions subject to Central Government revision. Procedural requirements prescribe forms, timelines, condonation rules, cross-objections, and revenue or Board-initiated references. Pre-deposit of duty or penalty is generally required for prosecuting appeals, subject to discretionary waiver for undue hardship. Distinct remedies include High Court reference for non-valuation/classification issues, Supreme Court appeal for valuation/classification, and settlement via the Settlement Commission under prescribed conditions.