Except in emergency, no order for delivery on a contract or open market order for supplies or contractual services for any county department or agency shall be awarded until the chief financial officer has certified that the unencumbered balance in the appropriation concerned, in excess of all unpaid obligations, is sufficient to defray the cost of such order.
Code 1950, § 15-546; 1962, c. 623, § 15.1-110; 1997, c. 587.