Sec. 9-3. Indebtedness; Prior Authorization Or Appropriation:

   No indebtedness shall be incurred, excepting such indebtedness as may be payable solely from the proceeds of a duly authorized bond issue or from a designated specified source, unless there is a prior appropriation out of which such indebtedness could be paid or such expenditure has been provided for in the annual budget ordinance as provided by statute. (1963 Code § 10.203)