Unichem Laboratories Ltd vs Collector Of Central Excise, Bombay

The Supreme Court considered whether a manufacturer of bulk drugs was entitled to exemption benefits under Notification No. 234/86. The core issue involved the classification of goods under the Central Excise Tariff Act, 1985, and the effective date of exemption following a change in tariff headings. The Court examined the transition from the previous tariff item 68 to the new heading 2913.00 to determine the applicability of duty exemptions.