SD relies on the 24/7 Sobriety Program (twice-daily PBTs or CAM bracelet) as its signature sanction more than interlock; IID is available/orderable but not universally mandatory.
By offense
First offense: IID not required at this level — Not mandatory. The court may permit limited driving privileges, and 24/7 Sobriety Program participation is commonly ordered instead.
Second offense: IID not required at this level — Not mandatory by statute; IID or 24/7 Sobriety Program commonly ordered as a condition.
Third offense: IID not required at this level — Not mandatory by statute; commonly ordered, and the 24/7 Sobriety Program is the state's signature alternative.
Fourth+ offense: IID required — On a 4th offense the mandatory parole term must include at least one of: an alcohol or drug accountability program, an ignition interlock, a breath alcohol interlock, an alcohol monitoring bracelet, or another enhanced monitoring tool.
Statute: SDCL § 1-11-32 (24/7); § 32-23-4.7
Some links on this site are paid advertising and we may be compensated when you use them. Advertising never affects which statutes or penalties we report — how this site makes money.