Ohio Revised Code Title XVII. Corporations Partnerships § 1701.23

(A) By the express terms of shares of any class or series, such shares may be redeemable, in whole at one time or in part from time to time, at the option of the corporation, or at a specified time or event, in such manner and upon such conditions, price, and notice as are provided in said express terms. The exercise of such right of redemption shall, however, be subject to the limitations provided in section 1701.35 of the Revised Code.

(B) Unless otherwise provided in the articles, redemption of a part only of the outstanding shares on call shall be pro rata or by lot in such manner as the directors deem equitable.