The Tamil Nadu Electricity Board(TNEB) will soon be coming out with a tariff structure for power from cogeneration using alternate fuels in sugar mills. Tariffs for power from duel fuels, bagasse and lignite, are under consideration. Currently, during the crushing season, sugar mills utilise bagasse as fuel for generating power and supplying the surplus to the TNEB grid. It is proposed that the sugar mills will be allowed to use lignite as a fuel for power generation during the off-season.