request and directed the petitioner to pay a sum of Rs.18,00,000/- in six instalments pending sanction of the estimate. The supply was to be released on payment of the first instalment. The bank guarantee was also furnished for the balance. A High Tension Agreement dated 26.6.1987 was duly entered by the parties for supply of H.T. power. After completing the formalities, the petitioner requested the officials of the respondent-Board for release of supply. The 4th respondent directed the petitioner to pay a sum of Rs.87,00,000/- towards security deposit and Rs.55,000/- towards service connection charges. As per the request of the petitioner the respondent-Board granted 12 monthly equal instalments. Accordingly the petitioner paid a sum of Rs.7,25,000- towards first E.M.I. and Rs.55,000/- towards service connection chages on 26.9.1987 and requested the respondent-Board to release the supply. The regular supply was not released to the petitioner on the ground that the proposal to release supply was sent to the respondent-Board for approval. Therefore, the petitioner filed W.P. 15257 of 1987 for release of supply. This court after hearing both sides directed the Board to release the supply. Accordingly supply was released on 20.10.1987. Thereafter a bill dated 20.10.1987 was issued for Rs.3,27,008-25ps. under H.T. category-III. According to the petitioner, the bill would be only Rs.38,802-57ps. if the H.T. category-I tariff is applied. The letter of the Board gave an option to the petitioner to choose H.T. category-I tariff and an agreement was duly executed and sent. The Board accepted the same. It is further contended that there are no norms for identifying the power intensive and the Board evaded defining the power intensive industry. No criterion was prescribed for selecting consumers. For the first time the Board in its proceedings in