No money shall be drawn from the Treasury of the City, nor shall any obligation for the expenditure of money be incurred, except pursuant to appropriations made by the Council. At the end of each year all unexpended balances of appropriations if any shall revert to the respective funds from which the same were appropriated and shall then be subject to future appropriations, but appropriations may be made in furtherance of improvements or other objects or work of the City which will not be complete within the current year.
Money appropriated as hereinbefore provided shall not be used for purposes other than those designated in the appropriation ordinance; provided however that the Council may from time to time appropriate or transfer such moneys so appropriated by the appropriation ordinance, by ordinance to such uses, or other fund or funds as will not conflict with any uses for which specifically such revenues accrued.