Mich. Comp. Laws § 500.1821

Sec. 1821. A risk retention group chartered or doing business in this state shall not do any of the following: (a) Solicit or sell insurance to a person who is not eligible for membership in the group. (b) Solicit or sell insurance if the risk retention group is in a hazardous financial condition or is financially impaired. (c) Have as a member or owner, whether directly or indirectly, an insurance company, unless all members of the risk retention group are insurance companies. (d) Issue an insurance policy with terms which provide, or could be construed to provide, coverage prohibited generally by law or declared unlawful by a final and binding decision of an appellate court that has considered the matter.