S.D. Codified Laws § 32-18-2 (2026)
Every vehicle described in § 32-18-1 shall be equipped with brakes acting on all wheels except as provided by §§ 32-18-3 to 32-18-6, inclusive.
Source: SL 1967, ch 197 , § 1 (c); SL 1968, ch 178 , § 3.