Wis. Stat. § 180.1020: Amendment of bylaws by board of directors or shareholders.

(1) A corporation’s board of directors may amend or repeal the corporation’s bylaws or adopt new bylaws except to the extent that any of the following applies:

(a) The articles of incorporation, s. 180.1021 (2) or 180.1022 (1) (a) or any other provision of this chapter reserve that power exclusively to the shareholders.

(b) The shareholders in adopting, amending or repealing a particular bylaw provide within the bylaws that the board of directors may not amend, repeal or readopt that bylaw.

(2) A corporation’s shareholders may amend or repeal the corporation’s bylaws or adopt new bylaws even though the board of directors may also amend or repeal the corporation’s bylaws or adopt new bylaws.