Minn. Stat. § 219.561
Subd. 1. Lights.
A person, firm, or corporation operating or controlling a railroad shall equip each of its track motor cars used during the period from 30 minutes before sunset to 30 minutes after sunrise with:
Subd. 2. Windshield and top.
Upon request of the section lead supervisor in any section operated by a railroad referred to in subdivision 1, a track motor car must be equipped within 90 days with a windshield and top wide and high enough to reasonably protect the employees from weather. However, a railroad company is not required in any one year to equip more than an additional 25 motor cars with that equipment.
Subd. 3. Penalty.
A person, firm, or corporation operating or controlling a railroad and using or permitting to be used on its line in this state a track motor car in violation of this section is guilty of a misdemeanor.