S.D. Codified Laws § 32-17-1 (2026)
Every motor vehicle other than a motorcycle, road roller, road machinery, or farm tractor shall be equipped with at least two headlamps with at least one on each side of the front of the motor vehicle. A violation of this section is a petty offense.
Source: SDC 1939, § 44.0352 (2); SL 1957, ch 226 ; SL 1974, ch 219 , § 19; SL 1989, ch 255 , § 42.