(1) At least once a month, at varying times the concessionaire shall take or cause to be taken stock of all the goods in the shop. The concessionaire shall give or cause to be given to the proper officer prior notice of the intention to take stock.
(2) On completion of stocktaking the concessionaire shall deliver or cause to be delivered to the proper officer a copy of the stocktaking account showing for each tariff description and trade brand, the stock of goods in standard units of delivery in the warehouse on the day on which the stock was taken.
(3) A certificate as to the accuracy of the stock is to be given at the foot of each stocktaking account by the concessionaire or his or her authorised representative.