Mich. Comp. Laws § 453.233: Stockholders.

Sec. 3.

Any person who has attained the age of 18 years and shall pay into the treasury of the society, at a time and in an amount and manner as the bylaws direct, a sum of money not to exceed $25.00, and subscribe to the articles of association shall be a stockholder or member therein and entitled to all the privileges and immunities thereof.