Mich. Comp. Laws § 500.1316

Sec. 1316. All statements, amendments, or other material filed pursuant to section 1311 or 1312 and all notices of hearings held pursuant to section 1315, shall be mailed by the insurer to its shareholders within 5 business days after the insurer has received them. The expenses of mailing shall be borne by the person making the filing. As security for the payment of the expenses, the person shall file with the commissioner an acceptable bond or other deposit in an amount to be determined by the commissioner. At the acquiring party's expense, the commissioner may conduct such examination or investigation as the commissioner is empowered to do under section 224.