All-offender interlock. § 56-5-2941 directs the DMV to require an ignition interlock on any vehicle driven by a person convicted under § 56-5-2930, § 56-5-2933, § 56-5-2945 or § 56-5-2947, or issued a temporary alcohol licence under § 56-1-286 or § 56-5-2951 — including first offences. The exception is a driver who submitted to a breath test and blew 0.00. A medical waiver is available where a person cannot physically operate the device, but the DMV then suspends the licence for the equivalent period instead.
By offense
First offense: IID required — South Carolina requires an interlock for essentially every conviction — § 56-5-2941 directs the DMV to require a device for anyone convicted under § 56-5-2930, with a narrow exception for a driver who submitted to a breath test reading 0.00, plus a medical waiver.
Second offense: IID required — Required; the interlock period lengthens with offence number and BAC tier.
Third offense: IID required — Required, for a substantially longer period than a first or second offence.
Fourth+ offense: IID required — Required; at this level the interlock requirement can extend for life.
Statute: S.C. Code § 56-5-2941
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.