June 11, 2012. Power projects using imported coal would soon be allowed to raise tariffs by up to '1 per unit to offset the effect of increase in fuel price due to additional taxes or changes in law by the governments of source countries. The power ministry has suggested to the central regulator to figure a way out of the logjam between promoters of big power projects and their bulk consumers - the state utilities. Power producers have been demanding tariff revision on the ground of coal prices rising substantially - in several instances five times - due to various reasons since the time their project was bid out or power supply pacts were signed.