The controlling officer [or any other officer to whom his powers have been delegated under rule 7] shall be responsible for the maintenance in respect of each vehicle under his control, of—
(a) a log book in the Form No. 1;
(b) a register to show the cost of petrol or powerine [Diesel and Mobil Oil] etc., consumed incidental receipts and expenditure in Form No. 2;
(c) an inventory of equipment in Form No. 3.
10. Precautions in respect of consumption of petrol [etc.] - (1) The [fuel] tanks of vehicles [shall] be fitted with locks and the keys thereof [shall] be kept in the possession of a responsible officer who [shall] be present when [fuel] is put into the tank. The log book [shall] be examined and signed by a responsible officer once a month when a balance [shall] be struck showing the total fuel consumption for the month. The officer [shall] satisfy himself that the consumptions reasonable. A report of the above shall be made at least once a month by such officer to the controlling officer.
(2) The registered number or the serial number of the vehicles should be pointed clearly and distinctly on the outside walls of all tyres on the vehicles.