Michigan Compiled Laws, Chapter 330. Mental Health Code § 330.2004

Sec. 1004. (1) A prisoner shall continue to be credited with those good time credits and other statutory reductions of his or her penal sentence to which he or she is entitled while in the corrections mental health program, subject to the terms and conditions that are applicable in a state correctional facility. The prisoner shall continue to be subject to all disciplinary sanctions that are not attributable to the prisoner's mental illness or developmental disability.

(2) At the time a prisoner is admitted to the corrections mental health program, the department of corrections shall notify the director of the corrections mental health program of the date on which the sentence of the prisoner is to expire and of any reductions of the sentence recorded to date. The corrections mental health program shall enter the sentence expiration date in the record it maintains for the prisoner.