S.D. Codified Laws § 32-24-3
If a conviction for a violation of § 32-24-1 is for a second or subsequent offense within a period of one year, such person is guilty of a Class 1 misdemeanor, and the court shall, in pronouncing sentence, order that the defendant's driving privilege be revoked for thirty days. However, the court may issue an order, upon proof of financial responsibility pursuant to § 32-35-43.1, permitting the person to operate a vehicle for purposes of the person's employment, attendance at school, or attendance at counseling programs. The court may also order the revocation of the defendant's driving privilege for a further period not to exceed one year or restrict the privilege in such manner as it sees fit for a period not to exceed one year.
SDCL 32-24-3