Mich. Comp. Laws § 18.1261c

Sec. 261c. (1) Beginning October 1, 2006, in addition to the requirements of sections 261, 261a, and 261b, in purchasing wood or paper products the department shall give preference to wood or paper products that derive from sustainably managed forests or procurement systems. (2) Paper product and forest product companies purchasing raw materials from or through third parties may reasonably rely upon the representations of landowners, vendors, or brokers as to whether the raw materials derive from sustainably managed forests or procurement systems. (3) As used in this section, "sustainably managed forests or procurement systems" means forests or procurement systems that are certified by an independent third party using 1 or more of the following certification programs: (a) The sustainable forestry initiative/American forest and paper association. (b) The American tree farm systems/American forest foundation. (c) The Canadian standards associations sustainable forest management system standards. (d) The forest stewardship council. (e) The Pan-European forest certification. (f) The Finnish forest certification system. (g) The United Kingdom woodlands assurance scheme. (h) International standards organization (ISO) standard 14001.