If the taxable person does not provide a satisfactory explanation within 30 days of being informed (extendable by the officer concerned) or after accepting discrepancies, fails to take corrective action in the return for the month in which the discrepancy is accepted, the Proper Officer may take recourse to any of the following provisions:
(a) Proceed to conduct audit under Section 65 of the Act;
(b) Direct the conduct of a special audit under Section 66 which is to be conducted by a Chartered Accountant or a Cost Accountant nominated for this purpose by the Commissioner; or
(c) Undertake procedures of inspection, search and seizure under Section 67 of the Act; or
(d) Initiate proceeding for determination of tax and other dues under Section 73 or 74 of the Act.