Special audit: authorised direction for Commissioner nominated accountant, report obligation, hearing right, and Commissioner paid expenses. An Assistant Commissioner, with Commissioner approval, may direct a registered person to have records audited by a Commissioner nominated chartered or cost accountant where declared value or input tax credit appears incorrect; the nominated accountant must submit a signed report within the prescribed period, extendable for cause. The provision applies despite other audits; the taxpayer has a right to be heard before material from the special audit is used in proceedings. The Commissioner determines and pays the audit expenses, and detected tax discrepancies may trigger recovery or adjudication proceedings under the Act.