Section 5(4)(f) in Orissa Electricity Regulatory Commission (Terms and Conditions for Determination of Tariff) Regulation, 2004
(f)An automatic fuel cost revision provision may be provided, and the licensee shall be required to compute changes in the fuel costs, and appropriately claim or refund the same in tariffs, on quarterly basis according to an automatic fuel cost revision provision. The fuel cost revision shall include fuel related expenses including variations in mix of power purchases.