Randox Industries has the following investment policy statement: "In order to achieve the safety and liquidity necessary in the investment of excess cash balances, the CFO or his designee may invest excess cash balances in 30-day U.S. Treasury bills, or in bankers acceptances with maturities of less than 31 days or 30-day certificates of deposit, where the credit rating of the issuing bank is A+ or higher." This policy statement is