Michigan Compiled Laws, Chapters 475 to 479 Motor Carrier Act § 476.13

Sec. 13. A motor carrier of general commodities authorized by this act to operate shall not discontinue any service established under this act without an order of the commission.A motor carrier of general commodities shall provide written notice of discontinuance to the commission in accordance with the rules of the commission. A certificate of authority under which service is discontinued for more than 30 days without the previous order of the commission authorizing the discontinuance may be revoked after notice.