Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.2126

Sec. 2126. An insurer may at any time suspend its acceptance of all applications from new automobile or home insurance risks by filing a notice with the commissioner. The notice shall specify the period of the suspension and the method by which the insurer proposes to effect the suspension. A suspension is subject to the disapproval of the commissioner if, after a hearing held pursuant to Act No. 306 of the Public Acts of 1969, as amended,  1 the commissioner finds that the suspension does not have a legitimate business purpose which is consistent with the purposes of this chapter or that the suspension would adversely affect the maintenance of a competitive market.