South Carolina’s Ignition Interlock Device Laws

South-Carolina-FlagIn the State of South Carolina, individuals convicted of driving under the influence (DUI) may either be ordered to install an ignition interlock device (IID). When court-ordered, an IID must be installed in all vehicles operated by the offender, whether or not the vehicle is registered to the individual. All costs associated with an IID must be paid by the offender and only devices installed by state-authorized vendors meet the program’s requirements. IIDs must be serviced every sixty (60) days and require a restricted license for use.

Offenders may be granted an employment exemption if they have to drive a company-owned vehicle as part of their employment, provided the offender is not owner or partial owner of the company. All other vehicles the offender operates must still have an IID installed. Rolling re-tests are standard in South Carolina-approved IIDs, meaning the driver must submit breath samples while the vehicle is in operation. After an offender’s period of suspension ends, the individual has ninety (90) days to install an IID or faces another three (3) years of license suspension.

South Carolina tracks IID violations using a point system. Once an offender accumulates four (4) or more points, the restricted license is suspended for one (1) year. Points may accumulate as follows:

  • Failure to service IID within 60 days – 1 point
  • Running re-test with blood alcohol content (BAC) between .02 and .04 – ½ point
  • Running re-test with BAC between .04 and .15 – 1 point
  • Running re-test with BAC .15 and up – 2 points
  • Attempt to start vehicle with BAC of .02 or higher – ½ point