Mich. Comp. Laws § 500.122

Sec. 122. Transactions or conduct authorized, prohibited, or permitted under a regulatory scheme under this code shall not be subject to the Michigan antitrust reform act, Act No. 274 of the Public Acts of 1984, being sections 445.771 to 445.788 of the Michigan Compiled Laws. The fact that a transaction or conduct concerns the business of insurance shall not exempt it from the Michigan antitrust reform act unless the activity has been authorized, prohibited, or permitted under a regulatory scheme under this code.