(1) During use, locomotive cabs must be heated to a minimum of 50 degrees Fahrenheit.

(2) When required by the season of the year, doors and windows of all locomotives must be equipped with adequate protection to occupants from the elements by means of weather stripping, or other device sufficient to provide equally adequate protection.

(3) Cabooses must be maintained in a clean and sanitary condition.

(4) When required by the season of the year, doors, and windows of cabooses must be equipped with adequate weather stripping.

(5) Every caboose used in any train in this state, regardless of service, must be provided with a stove or other adequate means of heating. The company shall provide a sufficient supply of fuel for the trip or shift.