Mich. Comp. Laws § 8.46

Sec. 6. The council, in the case of the compiled laws, and the office of regulatory reform, in the case of the Michigan administrative code, may enter into 1 or more contracts or provide for the preparation and publication of subsequent editions and cumulative or other supplements. The contracts as to supplements may be awarded for a period of not more than 10 years under such terms as prescribed by the council, in the case of the compiled laws, and as prescribed by the office of regulatory reform, in the case of the Michigan administrative code.