Mich. Comp. Laws § 477.11

Sec. 11. Each motor carrier of household goods that ceases operations or abandons its rights under the authority issued shall notify the commission in writing in accordance with the rules of the commission within 30 days of the cessation or abandonment. The commission may, after notice and a hearing, revoke a certificate of authority under which service is discontinued for more than 30 days without the previous order of the commission authorizing the discontinuance.