Michigan Compiled Laws, Chapter 257. Motor Vehicles § 257.1823

Sec. 23. (1) A school bus shall be equipped in a manner that the driver, in a normal seated position, either by direct vision or by use of an indirect vision mirror system, shall be able to observe objects on the roadway in front of and beside the vehicle located inside a continuously visible rectangular area. The school bus shall comply with the visibility and equipment requirements of 49 CFR 571.111.

(2) The interior mirror shall be clear view, safety glass with a reflective surface that provides a clear and reasonably unobstructed view to the rear of the vehicle and complies with 49 CFR 571.111. It shall have rounded corners and padded edges.

(3) Sun shades, if installed, shall be mounted so that the mounting brackets are not likely to cause injury in the event of an accident.