Mich. Comp. Laws § 46.357

Sec. 7. (1) A county or regional commission shall file with the department of natural resources a record of its land ownership, proposals for acquisition of land, and its general development plans and programs for improvement and maintenance of the land. (2) A writing prepared, owned, used, in the possession of, or retained by a county or regional commission, in the performance of an official function shall be available to the public in compliance with Act No. 442 of the Public Acts of 1976, being sections 15.231 to 15.246 of the Michigan Compiled Laws.