42.       (1)       Every taxable person, registered person, casual trader or any other person, who is required so to do by the Commissioner or the designated officer by notice served on him, shall keep a true account of the goods sold and purchased by him.

(2)     If the officer referred to in sub-section (1), considers that the accounts kept are not sufficiently clear or intelligible to determine, whether or not a person is liable to pay tax during any period or the accounts are so kept as not to enable a proper scrutiny of the returns or the statements furnished, he may require such person by notice in writing to keep such accounts, including records of sales or purchases in such form or manner, as in his opinion are necessary for the purpose of proper assessment of tax.

(2)       Every taxable person and registered person shall keep all his account books including those relating to his stock of goods or to purchases, sales and delivery of goods made by him or payments made or received, at the place or places of business, specified in his registration certificate or with the previous approval of the Commissioner or the designated officer at such other place or places, as may be allowed.

(3)       Every person, shall produce all account books relating to his business, if so required by the designated officer, for the purpose of authentication in the manner as may be prescribed.