(1) On the first working day of each month, the concessionaire shall deliver or cause to be delivered to the proper officer a schedule showing, for each tariff description and trade brand, the total quantity of goods in standard units delivered for shipment during the preceding month.
(2) On 1 January, 1sApril, 1 July and 1 October in each year or at such other quarterly intervals as the Comptroller may allow the concessionaire shall deliver to the proper officer a balance return of stock in such form as the Comptroller may require, showing for the preceding quarter, in respect of each tariff description and trade brand of goods particulars in standard units so as to reflect the following—
(a) the balance of goods remaining in the warehouse from the previous quarter;
(b) goods received in the warehouse during the quarter;
(c) goods delivered from the warehouse during the quarter;
(d) stock remaining in the warehouse at the end of the quarter.