Mich. Comp. Laws § 500.2618
If at any time after the applicable review period provided for in section 2616, the commissioner finds that a filing does not meet the requirements of this chapter, the commissioner shall, after a hearing held upon not less than 10 days' written notice, specifying the matters to be considered at the hearing, to every insurer and rating organization that made the filing, issue an order specifying in what respects the commissioner finds that the filing fails to meet the requirements of this chapter, and stating when, within a reasonable period thereafter, that filing shall be considered no longer effective. A copy of the order shall be sent to every insurer and rating organization subject to the order. The order shall not affect any contract or policy made or issued before the date the filing becomes ineffective as indicated in the commissioner's order.
MCL 500.2618