Any Commissioner or Deputy Commissioner may at any time, for the purpose of satisfying himself as to the legality or propriety of any order passed by, and as to the regularity of the proceedings of, any Revenue-officer subordinate to him, call for and examine the record of any case pending before, or disposed of by, such officer, and may pass such order in reference thereto as he thinks fit :
     Provided that he shall not under this section modify or reverse any order affecting any question of right between private persons, without having given to the parties interested reasonable notice to appear and be heard in support of such order.