M/S. Kothari Industrial Corp. Ltd vs Tamilnadu Electricity Board & Anr

The Supreme Court addressed the applicability of promissory estoppel in the context of concessional electricity tariffs under the Tamil Nadu Revision of Tariff Rates on Supply of Electrical Energy Act, 1978. The Court held that the appellants, having relied on the government's promise of a concessional tariff, were entitled to invoke promissory estoppel despite subsequent amendments to the tariff schedule. The Court ruled in favor of the appellants, allowing them to benefit from the promised tariff rates for the specified period, notwithstanding the amendments made by G.O. No.861 dated 30.4.1982.