ANDHRA STEEL CORPORATION LTD. ETC. vs ANDHRA PRADESH STATE ELECTRICITYBOARD AND ORS.

The Supreme Court upheld the High Court's dismissal of Writ Petitions filed by mini steel plants challenging the withdrawal of a concessional tariff for electricity supply under the Electricity Supply Act, 1948, specifically Sections 48 and 78-A. The Court ruled that the Electricity Board was not bound to supply electricity at the concessional rates due to the State Government's clarifications allowing for minimum charges and normal terms of supply. The principles of natural justice, promissory estoppel, and legitimate expectation were found not to apply in this context, affirming the Board's discretion in tariff matters.