Section 21(1) in The Mineral Conservation And Development Rules, 1988
(1)Where heavy earth moving is used in mines, the owner, agent, mining engineer or manager of the mine shall maintain Log Books in respect of each machine showing date-wise account of hours worked, hours not worked, reasons for non-working, consumption of fuel/energy and lubricants and output of the machine during the corresponding working hours. The summary of operation of each machine shall be recorded in the Log Book at the end of each month bringing out the percentage availability and percentage utilisation of the machine, average hourly performance and average fuel/energy consumption per hour.
