Michigan Compiled Laws, Chapter 800. Prisons § 800.329

Sec. 9. Correctional industries, with the approval of the department of management and budget, may purchase finished goods, materials, or equipment of the same type as ordinarily produced by correctional industries. The industries may then sell the items to those entities for whom production by correctional industries is permitted by this act. The purpose of this section is to provide for the completing of orders when production is not sufficient or for other reasons of economy and good business practice which may make the purchases beneficial to the state.