Mich. Comp. Laws § 500.1017

Sec. 1017. (1) In addition to the annual audited financial report, each insurer shall furnish the commissioner with a written communication as to any unremediated material weaknesses in the insurer's internal controls over financial reporting noted during the audit. This communication shall be prepared by the accountant within 60 days after the filing of the annual audited financial report and shall contain a description of any unremediated material weaknesses, as of the December 31 immediately preceding, in the insurer's internal control over financial reporting noted by the accountant during the course of his or her audit of the financial statements. The communication shall also state if no unremediated material weaknesses were noted. (2) The insurer shall provide to the commissioner a description of remedial actions taken or proposed to correct unremediated material weaknesses, if the actions taken or proposed are not described in the accountant's communication.