Mich. Comp. Laws § 500.1807

Sec. 1807. Before it may offer insurance in this state, a risk retention group chartered in this state shall submit to the commissioner for approval a plan of operation or feasibility study and, within 10 days of a change, shall submit an appropriate revision if a subsequent material change in an item of the plan of operation or feasibility study occurs. The risk retention group shall not offer any additional kinds of liability insurance until a revision of the plan of operation or feasibility study is approved by the commissioner.