Michigan Compiled Laws, Chapter 462. Railroads § 462.34

Sec. 34. Whenever the commission shall have reasonable grounds to believe, either on complaint or otherwise, that any of the equipment, cars, tracks, bridges or other structures of any common carrier of this state are in a condition which renders any of them dangerous or unfit for the transportation of passengers with reasonable safety, or unreasonably endangering the employes of such carrier, it shall be its duty to inspect and examine, or cause to be inspected, examined and tested by some competent person or persons, and for that purpose it, the said commission, may employ some other person possessing especial knowledge and skill in the construction of railroads and bridges, as an expert, and if, on such examination, in its opinion any such equipment, cars, trucks, bridges or other structures be dangerous or unfit for the transportation of passengers with reasonable safety, or unreasonably endanger the employes of such carrier, it shall be its duty to give the superintendent or other executive officer of the corporation, working or operating said defective, dangerous or unfit equipment, car, track or bridge or other structure, notice of the condition thereof, and of the repairs or changes necessary to place the same in a reasonably safe condition, and of the time within which such repairs or changes shall be made. It may also order and direct the rate of speed of passing trains or cars over such dangerous or defective track, bridge or other structure, until the said repairs shall be made. If any superintendent or other executive officer aforesaid, receiving such notice or order to direct the proper subordinate officers of said corporation to run the passenger trains or cars over such defective track, bridge or other structure, at the speed so prescribed by the commission, or if any engineer, conductor or other employe of such company shall knowingly disobey such order, every such superintendent, officer, conductor or employe shall be deemed guilty of a misdemeanor, and upon conviction thereof shall be punished as provided in section 43 of this act.  1 The said commission shall have power to wholly prohibit the running of passenger trains or cars over such defective, dangerous or unfit track, bridge or other structure, or the use of such dangerous, unfit or defective equipment or car, if said company shall neglect or without reasonable cause fail to make such repairs within the time prescribed by the commission; and such company, for each and every day that ensues thereafter, and until such changes or repairs are made, shall forfeit and pay to the state the sum of 100 dollars. In case of the employment of an expert, as provided for in this section, the commission shall issue a certificate, which shall set forth the amount of time said expert has been employed, and the pay he is to receive therefor, which certificate shall entitle the holder thereof to receive the amount mentioned therein in the same manner as other employes of the state are paid.