Michigan Compiled Laws, Chapter 330. Mental Health Code § 330.1420

Sec. 420. If a written notice of termination of mental health treatment is given to a hospital or provider of mental health treatment under section 419,  1 if the notice is not withdrawn, and if the hospital director or provider of mental health treatment determines that the patient is a person requiring treatment and should remain in the hospital or continue to receive mental health treatment, the hospital director, provider of mental health treatment, or other suitable person shall within 3 days after receipt of the notice file a petition with the court that complies with section 434.  2 The petition shall be accompanied by 1 clinical certificate executed by a psychiatrist and 1 clinical certificate executed by either a physician or a licensed psychologist. If a petition is filed, the hospital or provider of mental health may continue hospitalization or mental health treatment of the patient pending hearings convened under sections 451 to 465.  3