Ohio Rev. Code Ann. § 4117.10
(A) An agreement between a public employer and an exclusive representative entered into pursuant to this chapter governs the wages, hours, and terms and conditions of public employment covered by the agreement. If the agreement provides for a final and binding arbitration of grievances, public employers, employees, and employee organizations are subject solely to that grievance procedure and the state personnel board of review or civil service commissions have no jurisdiction to receive and determine any appeals relating to matters that were the subject of a final and binding grievance procedure. Where no agreement exists or where an agreement makes no specification about a matter, the public employer and public employees are subject to all applicable state or local laws or ordinances pertaining to the wages, hours, and terms and conditions of employment for public employees. All of the following prevail over conflicting provisions of agreements between employee organizations and public employers:
(1) Laws pertaining to any of the following subjects:
(D) There is hereby established an office of collective bargaining in the department of administrative services for the purpose of negotiating with and entering into written agreements between state agencies, departments, boards, and commissions and the exclusive representative on matters of wages, hours, terms and other conditions of employment and the continuation, modification, or deletion of an existing provision of a collective bargaining agreement. Nothing in any provision of law to the contrary shall be interpreted as excluding the bureau of workers' compensation and the industrial commission from the preceding sentence. This office shall not negotiate on behalf of other statewide elected officials or boards of trustees of state institutions of higher education who shall be considered as separate public employers for the purposes of this chapter; however, the office may negotiate on behalf of these officials or trustees where authorized by the officials or trustees. The staff of the office of collective bargaining are in the unclassified service. The director of administrative services shall fix the compensation of the staff. The office of collective bargaining shall: