(1)    Unless the articles of incorporation provide otherwise, the principal officers of a cooperative are a president, one or more vice presidents as prescribed in the bylaws, a secretary and a treasurer. They shall be elected annually by the board at such time and in such manner as the bylaws provide. Upon original election and whenever any change is made in the officers, the cooperative shall file with the department, within 20 days, a report showing the name and address of all officers. Each principal officer except the secretary and the treasurer must be a director of the cooperative. The offices of secretary and treasurer may be combined in one person.

   (1m)   Any principal officer of a cooperative may be designated by a title other than those designated under sub. (1), as provided in the articles of incorporation of the cooperative. The provisions of this chapter applicable to a principal officer as designated under sub. (1) apply to the principal officer as designated according to the provisions of the articles of incorporation. Any document required or permitted by this chapter to be signed by the president, vice president, secretary or assistant secretary may be signed by such officer as may be stated in such document to correspond to the officer so required or permitted to sign.

   (2)   Any other officer may be chosen by the board or as provided in the bylaws.

   (3)   All officers shall have such authority and perform such duties as the bylaws provide, or as the board may determine not inconsistent with the bylaws. Any officer may be removed by the board whenever in its judgment the best interests of the cooperative will be served thereby. Election or appointment shall not of itself create contract rights.