Ohio Rev. Code § 4125.08: Professional license requirements unaffected - shared employee is employee of client employer.

Nothing in this chapter exempts a professional employer organization, client employer, or shared employee from any applicable federal, state, or local licensing, registration, or certification statutes or regulations. An individual required to obtain and maintain a license, registration, or certification under law and who is a shared employee of a professional employer organization and a client employer is an employee of the client employer for purposes of obtaining and maintaining the appropriate license, registration, or certification as required by law. A professional employer organization does not engage in any occupation, trade, or profession that requires a license, certification, or registration solely by entering into a professional employer agreement with a client employer or coemploying a shared employee.

A client employer shall have the sole right of direction and control of the professional or licensed activities of shared employees and of the client employer's business. The shared employees and client employers shall remain subject to regulation by the board, commission, or agency responsible for licensing, registration, or certification of the shared employees or client employers.