S.D. Codified Laws § 2-1-6
Current with legislation signed by the governor on or before 3/6/2024
Every person who is a qualified voter may sign a petition to initiate a constitutional amendment or other measure or to refer a law. If a person, knowing he or she is not a qualified voter of the state or knowing that he or she has already signed the same petition, signs a petition for initiation of a constitutional amendment or other measure or for referral of legislation or if any person signs a name other than his or her own, that person is guilty of a Class 1 misdemeanor.
SDCL 2-1-6