(2)Without prejudice to the provisions contained in sub-section (1), the Commissioner may call for and examine the record of any proceeding under this Act, and, if he considers that any order passed therein by an Assessing Officer is erroneous in so far as it is prejudicial to the interests of revenue, he may, after giving the assessee an opportunity of being heard, and after making or causing to be made such inquiry as he deems necessary, pass such order thereon as the circumstances of the case justify, including an order enhancing or modifying the assessment or cancelling it and directing a fresh assessment.Explanation.-For the removal of doubts, it is hereby declared that, for the purposes of this sub-section,-(a)an order passed on or before or after the 1st day of June, 1988, by the Assessing Officer shall-include an order passed by the Deputy Commissioner in exercise of the powers or in performance of the functions of an Assessing Officer conferred on or assigned to him under orders or directions issued by the Board or by the Chief Commissioner or Director-General or Commissioner authorised by the Board in this behalf under section !20 of the Income-tax Act read with section 7 of this Act;(b)"record" shall include and shall be deemed always to have included all records relating to any proceeding under this Act available at the time of examination by the Commissioner;(c)where any order referred to in this sub-section and passed by the Assessing Officer had been the subject-matter of any appeal filed on or before or after the 1st day of June, 1988, the powers of the Commissioner under this sub-section shall extend to and shall be deemed always to have extended such matters as had not been considered and decided in such appeal.