Ohio Rev. Code § 307.89: Accepting bids.

When a bid is accepted for a contract other than for the construction, demolition, alteration, repair, or reconstruction of an improvement, the contracting authority shall, as a condition to entering a contract with the successful bidder, require faithful performance of all things to be done under the contract and may require, as a condition to entering a purchase contract, lease, or lease with option or agreement to purchase, the bond provided for by section 153.57 of the Revised Code, with good and sufficient surety in an amount not to exceed the amount of the bid.