Ohio Rev. Code Ann. § 4115.071
(A) Each contracting public authority that enters into a contract other than a contract for printing, binding, and related services, whose contractor and subcontractors are subject to sections 4115.03 to 4115.16 of the Revised Code shall, no later than ten days before the first payment of wages is payable to any employee of any contractor or subcontractor, designate and appoint one of its own employees to serve as the prevailing wage coordinator during the life of the contract. The duties of the coordinator shall include: