Ohio Rev. Code Ann. § 1701.71
(A)
(1)
(c) Any amendment that would provide that section 1701.831 of the Revised Code does not apply to control share acquisitions of shares of an issuing public corporation shall be adopted:
(B) Regardless of limitations or restrictions in the articles on the voting rights of the shares of any class, the holders of shares of a particular class, and in the cases specified in divisions (B)(6), (7), and (8) of this section the holders of shares of every class, shall be entitled to vote as a class on the adoption of an amendment that does any of the following:
(5) Authorizes shares of another class that are convertible into, or authorizes the conversion of shares of another class into, shares of the particular class, or authorizes the directors to fix or alter conversion rights of shares of another class that are convertible into shares of the particular class; provided, however, both of the following apply: