Ohio Rev. Code Ann. § 1729.35
(B)
(1) If the agreement of merger or consolidation provides that a holder of stock other than membership stock or patronage stock in a constituent association will be affected, all of the following apply:
(2) For purposes of this section, a holder of stock is affected as to any class of stock owned by the holder only if the agreement of merger or consolidation does any of the following:
(C) The agreement is approved if both of the following conditions are met with respect to each constituent association:
(E) After approval of an agreement under this section, but before the merger or consolidation is effective, the agreement may be amended in accordance with any provision for amendment set forth in the agreement, provided that an amendment made subsequent to adoption of the agreement by the members of any constituent association shall not do any of the following: