S.D. Codified Laws § 32-17-25
Current with legislation signed by the governor on or before 3/6/2024
Every bicycle shall be equipped with a lighted lamp on the front thereof visible under normal atmospheric conditions from a distance of at least three hundred feet in front of such bicycle and shall also be equipped with a reflex mirror or lamp on the rear exhibiting a yellow or red light visible under like conditions from a distance of at least two hundred feet to the rear of such bicycle. A violation of this section is a petty offense.
SDCL 32-17-25