Special audit: officer may direct audit by nominated accountant when declared value or credit appears misstated, with report. Special audit permits a senior officer to direct a taxable person to have records audited by a Commissioner nominated chartered or cost accountant where declared value or input tax credit appears incorrect; the nominated auditor must deliver a signed report within the prescribed period (extendable for cause), the taxpayer has a right to be heard before material from the audit is used, the Commissioner determines and pays audit expenses, and detection of tax discrepancies may trigger further statutory action.