yes, of course with justification.The Pio will have to justify the exact nature of the additional costs. Overtime is just not a justified!
Manoj, the overtime cost has been quoted by Shri. Wajahat Habibullah in an off campus talks at a National academy at Ghaziabad on 30th March 2007 hence I treat it as authentic precedence.
When used, should be appropriately understood with the information been sought which is concerned with the nature of the information.