Michigan Compiled Laws, Chapter 800. Prisons § 800.327

(a) Routine maintenance and operation of correctional institutions.

(b) Educational and rehabilitation activities, whether formal or through productive or socialized activities, determined on the basis of individual needs and educability.

(c) Productive or maintenance labor on or in connection with the institution farms, or other land rented or leased by the department of corrections, factories, shops, or other available facilities for the production and distribution of correctional industries products and services.

(d) Labor assignments on state public works, ways, or properties when and as requisitioned by the governor or on county, township, or district roads when requested by the county board of commissioners pursuant to section 1 of 1911 PA 181, MCL 800.101.

(e) Labor assignments in private manufacturing or service enterprises established under section 7a.  1

(f) Labor assignments in connection with manufacture of products under section 4(1)(h)  2 and in connection with the disassembly and disposal of items and scrap material under section 4(1)(i).