Special audit powers permit ordering an auditor when declared value or input credit appears incorrect, with report and hearing rights. Special audit powers permit an Assistant Commissioner, with the Commissioner's prior approval, to require a registered person to have records audited by a chartered or cost accountant nominated by the Commissioner when declared value or input tax credit appears incorrect or abnormal; the nominated accountant must submit a certified report within a prescribed period, subject to extension, and the Commissioner determines and pays audit expenses. Material from the special audit triggers an opportunity to be heard before use and may lead to initiation of recovery or assessment proceedings if tax discrepancies are found.