Wis. Stat. § 221.0214: Amendment of bylaws by board of directors or shareholders.

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

(a) The articles of incorporation, s. 221.0503 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, provided in the bylaws that the board of directors may not amend, repeal or readopt that bylaw.

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