Mich. Comp. Laws § 450.108

Sec. 108. Same; contracts and agreements. Every cooperative corporation engaged in buying, handling, selling or dealing in farm produce or other agricultural products, canned goods, or byproducts of any such goods, wares, merchandise or commodities, may enter into any and all necessary contracts with stockholders, members or other persons respecting the terms of such transaction, and may deal in such commodities upon commission or brokerage basis, by agency agreements, or upon a warehouse storage plan.