The orders and decisions of the commission on the matters covered by this act shall be made in writing and copies of such decisions shall be served on motor carriers by electronic mail if authorized by the motor carrier or first class mail, except that orders and decisions potentially resulting in a negative impact upon any motor carrier’s authority and initial orders in show cause proceedings shall be served by certified mail, return receipt requested. A motor carrier may, at any time, revoke the authorization to receive the orders and decisions through electronic mail provided by this section, and any orders or decisions of the commission after the date of the revocation shall be served by mail. Every order and decision of the commission on matters covered by this act shall become operative and effective within 30 days after service, and the motor carrier shall carry the provisions of the order into effect, unless the order is enjoined or set aside by a court of proper jurisdiction.