Michigan Compiled Laws, Chapter 333. Health § 333.1066

Sec. 16. (1) The provisions of this act are cumulative and do not impair or supersede a legal right that an individual may have to consent to or refuse medical treatment for himself or herself or that a parent, guardian, or other individual may have to consent to or refuse medical treatment on behalf of another.

(2) This act does not create a presumption concerning the intent of a person executing an order to consent to or refuse medical treatment in circumstances other than the cessation of both spontaneous circulation and respiration.

(3) This act does not create a presumption concerning the intent of an individual who has not executed an order to consent to or refuse any type of medical treatment.