Coal India Ltd (CIL) has been given freedom to pass mine closure costs on to consumers, but has not taken any such step yet, a company official said on Monday. The Maharatna PSU may consider "levying an additional fee on per tonne basis to be paid by the coal consumers to meet the cost of mine closure with the approval of the board and to provide funding for those subsidiaries which are not able to fund the closure of these mines", an official said quoting a Coal ministry notification.