Ohio Revised Code Title XXV. Courts Appellate § 2503.01

(A) Engaged in the practice of law in this state;

(B) Practiced in a federal court in this state, regardless of whether at the time of that practice the person was admitted to practice as an attorney at law in this state or practiced in the courts of this state;

(C) Engaged in the authorized practice of law as in-house counsel for a business in this state or as an attorney for a government entity in this state, regardless of whether at the time of that practice the person was admitted to practice as an attorney at law in this state or practiced in the courts of this state.