Ohio Revised Code Title XLI. Labor and Industry § 4125.10

(A) Diminish, abolish, or remove the rights and obligations of client employers and shared employees existing prior to the effective date of the professional employer organization agreement;

(B) Affect, modify, or amend any contractual relationship or restrictive covenant between a shared employee and any client employer in effect at the time a professional employer organization agreement becomes effective;

(C) Prohibit or amend any contractual relationship or restrictive covenant between a client employer and a shared employee that is entered into after the professional employer organization agreement becomes effective;

(D) Create any new or additional enforcement right of a shared employee against a professional employer organization that is not specifically provided by the professional employer organization agreement or this chapter.

A professional employer organization shall have no responsibility or liability in connection with, or arising out of, any contractual relationship or restrictive covenant between a client employer and a shared employee unless the professional employer organization has specifically agreed otherwise in writing.