S.D. Codified Laws § 58-17-39 (2026)
There may be a provision as follows: "Illegal occupation: The insurer shall not be liable for any loss to which a contributing cause was the insured's commission of or attempt to commit a felony or to which a contributing cause was the insured's being engaged in an illegal occupation."
Source: SL 1966, ch 111 , ch 25, § 22.