S.D. Codified Laws § 32-15-8
Current with legislation signed by the governor on or before 3/6/2024
Every motor vehicle entitled to be licensed in South Dakota 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 two hundred feet to the rear of such vehicle, whether operated singly or towing another vehicle. A violation of this section is a petty offense.
SDCL 32-15-8