Sec. 2-241. - Encumbrance of funds.

Except in cases of emergency, the purchasing agent shall not issue any order for delivery on a contract or open market purchase until the city controller shall have certified, after pre-audit, that there is to the credit of the using agencies concerned a sufficient unencumbered appropriation balance, in excess of all unpaid obligations, to defray the amount of such order.

(Rev. Ords. 1987, § 2-241)