Mich. Comp. Laws § 450.1201

Sec. 201. (1) One or more persons may be the incorporators of a corporation by signing and filing articles of incorporation for the corporation. (2) A corporation incorporated to provide 1 or more services in a learned profession must be incorporated as a professional corporation under chapter 2A. (3) A corporation incorporated to provide professional services other than services in a learned profession may comply with chapter 2A and incorporate as a professional corporation, or may incorporate as a corporation under chapter 2 without complying with chapter 2A.