Michigan Compiled Laws, Chapter 450. Corporations § 450.3148

Sec. 1148. (1) The purchase or sale of any member capital or privileges in a cooperative made under execution, or in the course of bankruptcy proceedings, or by any legal process or by operation of law, shall not give any person any membership right, title, or interest in a cooperative, unless in accordance with the articles or bylaws of the cooperative.

(2) No subsequent amendment to the articles or bylaws shall invalidate or otherwise impair a pledge of a certificate issued under section 1136  1 or an assignment of a proprietary lease or other agreement providing for occupancy of facilities furnished by the cooperative, if the pledge or assignment was made when the articles or bylaws expressly permitted the pledge or assignment in connection with loans made to members.