An annual appropriation ordinance shall be prepared by Council from estimates submitted by the Mayor. For the purpose of preparing such ordinance, the Mayor shall receive from each office or department for which appropriations are made a statement of expenses for the previous year and estimated expenses for the next year. The annual appropriation ordinance shall be submitted to Council in time for passage at its meeting in December of the preceding year. Supplemental appropriation may be made by Council as needed. The total of all appropriation ordinances passed shall not exceed the total balances carried over from the previous year plus the estimated revenue of the current year. All unexpended balances of appropriations not encumbered for future needs shall revert to the respective funds from which they were appropriated and shall then be subject to future appropriations.
The Mayor and Director of Finance shall supervise all departmental expenditures so that all expenditures are kept within appropriations.