Mich. Comp. Laws § 400.66h
Nothing in this act shall be construed as empowering any physician or surgeon, or any officer or representative of the state or county departments of social welfare, in carrying out the provisions of this act, to compel any person, either child or adult, to undergo a surgical operation, or to accept any form of medical treatment contrary to the wishes of said person. If the person for whom surgical or medical treatment is recommended is not of sound mind, or is not in a condition to make decisions for himself, the written consent of such person's nearest relative, or legally appointed guardian, or person standing in loco parentis, shall be secured before such medical or surgical treatment is given. This provision is not intended to prevent temporary first aid from being given in case of an accident or sudden acute illness where the consent of those concerned cannot be immediately obtained.
MCL 400.66h