law: 38. Accounts.
  (1) Every dealer liable to pay tax under this Act, and every other dealer on whom a notice has been served to furnish returns under sub-section (2) of section 21 shall keep at his place of business a true account of the value of goods bought and sold by him, and if the Commissioner considers that such account is not sufficiently clear and intelligible to enable him to make a proper check of the returns referred to in that sub-section, he may require such dealer by notice in writing to keep such accounts (including records of purchases and sales) and as may be specified therein.
  (2) The Commissioner may, by notification in the Official Gazette, direct any class of registered dealers generally to keep such accounts (including records of purchases and sales) as may be specified in the notification subject to such conditions and restrictions as may be prescribed.