Ohio Rev. Code § 4730.33
The secretary of the state medical board shall enforce the laws relating to the practice of physician assistants. If the secretary has knowledge or notice of a violation of this chapter or the rules adopted under it, the secretary shall investigate the matter, and, upon probable cause appearing, file a complaint and prosecute the offender. When requested by the secretary, the prosecuting attorney of the proper county shall take charge of and conduct such prosecution.
In the prosecution of any person for violation of division (A) of section 4730.02 of the Revised Code it shall not be necessary to allege or prove want of a valid license to practice as a physician assistant, but such matters shall be a matter of defense to be established by the accused.
R.C. § 4730.33