In section 133 of the Income-tax Act, in clause (6), with effect from the 1st day of July, 1995, -
(a) after the words "will be useful for, or relevant to, any" the words "inquiry or" shall be inserted; and
(b) after the proviso, the following proviso shall be inserted, namely :-
"Provided further that the power in respect of an inquiry, in a case where no proceeding is pending, shall not be exercised by any income-tax authority below the rank of Director or Commissioner without the prior approval of the Director or, as the case may be, the Commissioner."