The text
(a)
Every motor vehicle which is so constructed or loaded as to obstruct the driver's view to the rear thereof from the driver's position shall be equipped with a mirror so located as to reflect to the driver a view of the highway for a distance of at least 200 feet to the rear of such vehicle.
(b)
Every motor vehicle, the primary function of which is the carrying of passengers, shall be equipped with a rearview mirror on the left front door or fender, so located as to reflect a view of the highway for at least 200 feet to the rear of the vehicle.
(Code 1971, § 22-152)