(a) All State agencies, maintaining a centralized storeroom or storehouse for the receipt and distribution of food, office supplies, household supplies or other commodities, shall maintain a perpetual inventory record of all articles received, and adequate records to show the distribution thereof. Such records shall show the date of receipt; quantity and description, the date and quantity of issue, and balance on hand. Disbursement or issue shall be supported by approved requisitions or other authorizations.

(b) A physical inventory shall be taken periodically, but not less than once each year of such stocks in the storehouse and a comparison made with the perpetual inventory records. Differences resulting from these comparisons shall be investigated and, after approval by an authorized person, the book records shall be adjusted to conform with the physical count.