Wis. Stat. § 180.1834: Greater quorum or voting requirements.

(1) The articles of incorporation of a statutory close corporation may impose a greater quorum or voting requirement for shareholders, or classes of shareholders, than is required by this chapter.

(2) An action by shareholders to adopt an amendment to the articles of incorporation that adds, changes or deletes a greater quorum or voting requirement must meet the same quorum requirement and be adopted by the same vote required to take action under the largest of the greater quorum or voting requirements then in effect or proposed to be added, changed or deleted.

(3) Section 180.0727 does not apply to a statutory close corporation.