In municipal corporations organized under sections 705.71 to 705.86, inclusive, of the Revised Code, there shall be a board of control composed of the mayor, who shall be the president thereof, the auditor, and the heads of the departments appointed by the mayor. The board of control shall:
No ordinance or resolution involving any expenditure of money for public improvements shall be passed until it has been approved by the board of control, except upon a two-thirds vote of the council of the municipal corporation.
R.C. §705.84