persons are approved by the Commissioner and the person manufacturing such substances certifies that the substances supplied to the licensee conform to the standards prescribed by or under the Prevention of Food Adulteration Act, 1954, and the rules framed thereunder, and that such substances have not remained unused fbr twelve months from the date of their receipt by the manufactory.] Correct accounts of all colouring and flavouring substances in the manufactory shall be maintained by the licensee in Form R L. XII. The accounts shall remain in the custody of the Manufactory Officer who shall check them at the end of each day*s work. (45) The licensee shall maintain accounts in proper forms and registers as required by these rules. The accounts shall be written every day which it shall be the duty of the Manufactory Officer to check and attest every day. (46) The licensee shall deliver to the Manufactory Officer not later than the 5th of each month, a return of transactions of business in respect of the preceding month in duplicate in Form P.L. XIII. The Manufactory Officer shall send one copy with his remarks to the District Prohibition and Excise Officer 18.