S.D. Codified Laws § 32-6B-28 (2026)
The owner of a vehicle described in § 32-6B-26, shall within forty-five days after the date of purchase, apply to the county treasurer of the owner's county of residence for registration and shall possess a bill of sale, or duplicate thereof, or a properly assigned registration card, which is subject at all times to inspection by a law enforcement officer.
Source: SL 1986, ch 250 , § 29; SL 1990, ch 228 , § 6; SL 2015, ch 156 , § 14.