For all purchases or contracts for services, the Purchasing Agent shall certify that (1) the required purchase price or compensation is provided for in the budget of the using department or has been approved by the City Council by resolution, and (2) there is to the credit of each using department concerned a sufficient and appropriate unencumbered balance in excess of all unpaid obligations to defray the cost of such purchase or contract. (Ord. 3400 § 1, 2017; Ord. 2899 § 1, 2003; Ord. 2766 § 1, 1998).