Mo. Rev. Stat. § 351.1111: Majority vote of members required, when.

1. Unless otherwise required by sections 351.1000 to 351.1228, the articles, or bylaws, the members shall take action by the affirmative vote of the members of a majority of the voting power of the membership interests present and entitled to vote on that item of business at a duly called members' meeting where a quorum is present.

2. Unless otherwise required in the articles or bylaws, in any case where a class or series of membership interests is entitled to vote on a particular matter of the cooperative as a class or series by sections 351.1000 to 351.1228, the articles, bylaws, or by the terms of such membership interests, then such matter shall also receive, in addition to the affirmative vote required in subsection 1 of this section, the affirmative vote of a majority of the voting power of the membership interests of such class or series at a duly called meeting where a quorum of such class or series is present.

3. (1) The articles or bylaws may provide for a greater quorum or voting requirement for members or voting groups than is provided for by sections 351.1000 to 351.1228.

(2) An amendment to the articles or bylaws that adds, changes, or deletes a greater quorum or voting requirement shall meet the same quorum requirement and be adopted by the same vote and voting groups required to take action under the quorum and voting requirements then in effect.