Michigan Compiled Laws, Chapter 450. Corporations § 450.4506

Sec. 506. (1) Unless otherwise provided in an operating agreement, an assignee of a membership interest in a limited liability company that has more than 1 member may become a member only upon a unanimous vote of the members entitled to vote. An assignee of a membership interest in a limited liability company that has 1 member may become a member in accordance with the terms of the agreement between the member and the assignee.

(2) An assignee that becomes a member of a limited liability company has, to the extent assigned, the rights and powers, and is subject to the restrictions and liabilities, of a member under the articles of organization, an operating agreement, and this act. An assignee that becomes a member also is liable for any obligations the assignor has to make contributions and to return distributions under sections 302 and 308(3). 1 An assignee is not obligated for liabilities unknown to the assignee at the time the assignee became a member unless the liabilities are shown on the financial records of the limited liability company.