Michigan Compiled Laws, Chapter 700. Estates and Protected Individuals Code § 700.5515

Sec. 5515. (1) A patient may waive the right to revoke a patient advocate designation as to the power to exercise mental health treatment decisions by making the waiver as part of the document containing the designation. However, mental health treatment provided to a patient who has communicated his or her intent to revoke a designation in which the patient has waived his or her right to revoke shall not continue for more than 30 consecutive days, and the waiver does not affect the patient's rights under section 419 of the mental health code, 1974 PA 258, MCL 330.1419.

(2) A patient advocate may exercise the power to make mental health treatment decisions only if a physician and a mental health practitioner both certify, in writing and after examination of the patient, that the patient is unable to give informed consent to mental health treatment. The patient may, in the document containing the patient advocate designation, designate a physician, a mental health practitioner, or both, to make the determination under this subsection. If a physician or mental health practitioner designated by the patient is unable or unwilling to conduct the examination and make the determination required by this subsection within a reasonable time, the examination and determination shall be made by another physician or mental health practitioner, as applicable.