S.D. Codified Laws § 32-17-6 (2026)
Headlamps shall be deemed to comply with the provisions of § 32-17-5 prohibiting glaring and dazzling lights, if none of the main bright portion of the headlamp beams rises above a horizontal plane passing through the lamp centers parallel to the level road upon which the loaded vehicle stands, and in no case higher than forty-two inches, seventy-five feet ahead of the vehicle. A violation of this section is a Class 2 misdemeanor.
Source: SDC 1939, § 44.0355 (2); SL 1989, ch 255 , § 60.