S.D. Codified Laws § 32-35-90
Proof of financial responsibility by self-insurer--Certificate of self-insurance
Any person in whose name more than twenty - five vehicles are registered in this state may qualify as a self - insurer by obtaining a certificate of self - insurance issued by the Department of Public Safety as provided in § 32-35-91 .
Source: SL 1957, ch 212, § 71; SDC Supp 1960, § 44.03A66; SL 2004, ch 17, § 172.