Mich. Comp. Laws § 500.2476

Sec. 2476. Agreements may be made among insurers with respect to the equitable apportionment among them of insurance which may be afforded applicants who are in good faith entitled to but who are unable to procure such insurance through ordinary methods and such insurers may agree among themselves on the use of reasonable rate modifications for such insurance, such agreements and rate modifications to be subject to the approval of the commissioner.