Ohio Rev. Code § 723.19: Procurement.

Upon the certification of the petition and the passage of the ordinance as provided in sections 723.17 and 723.18 of the Revised Code, the board or officer having charge of the repair of streets in the municipal corporation may purchase the appliances and materials and employ the labor necessary to provide for sprinkling, or make contracts for all or any part thereof for periods not exceeding five years.