Michigan Compiled Laws, Chapter 290. Weights, Measures and Standards § 290.452

Sec. 2. (1) A person shall not engage in or purport to be engaged in the business of a wholesale potato dealer or advertise as a wholesale potato dealer, unless that person is licensed by the director to carry on that business.

(2) A grower or grower cooperative who buys or receives only seed potatoes from another grower or grower cooperative for the grower's or grower cooperative's own planting use is exempt from this act.

(3) A wholesale potato dealer who does not sell or handle potatoes in wholesale lots for the purpose of processing or resale to other wholesale potato dealers, retailers, restaurants, hotels, or institutions and who buys an aggregate amount of less than 30,000 pounds of potatoes during each calendar month of a calendar year is exempt from this act for the following calendar year.