Sec. 7. Unless this article, the articles of incorporation, or the board of directors acting under section 5 of this chapter requires a greater vote or a vote by voting groups, the amendment to be adopted must be approved by:
(1) a majority of the votes entitled to be cast on the amendment by any voting group with respect to which the amendment would create dissenters' rights; and
(2) the votes required by IC 28-13-6-6 and IC 28-13-6-7 by every other voting group entitled to vote on the amendment.