Writing of losses

13. Subject to such conditions as may be specified by the Government, where the Board is of opinion that any amount due to or any loss, whether of money or of property, incurred by the Board is irrecoverable, the Board may with the previous approval of the Government, sanction the writing off finally of the said amount or loss: Provided that no such approval of the Government shall be necessary where such irrecoverable amount or loss does not exceed in any individual case and in the aggregate in any year such amounts as may be prescribed.