South Carolina

South Carolina Legislation

Year of last legislative change: Awaiting data
Year of last revision to administrative code: Awaiting data
Most challenging aspects associated with introducing and passing interlock legislation: Awaiting data
Changes for program improvement being pursued:
All offender legislation. Implied consent violations, there are several ways you can get out of it. If you violate the law, there is an administrative suspension you can get an IID to lift that suspension. The proposed law would require 3 months of IID on implied consent suspension if you’re contesting it.
Who is eligible for an interlock in your state according to legislation (Data provided by CIIM):
Repeat impaired drivers, High BAC (.10-.18) impaired drivers
Can impaired drivers 'wait out' their interlock requirement:
Is an interlock required on test refusal:

Program Authority

Type of program: Administrative
Agency/agencies with authority over the interlock program:
Department of Motor Vehicles, Probation
Agency/agencies with authority over participant monitoring:
Agency/agencies with authority over sanctioning interlock program participants:
Agency/agencies with authority to approve devices:
Training available for judges, law enforcement, and lawyers:
All training is through the individual agency. We have done some training for LEOs, but it is not “official” training. When there was the 2014 law change, we did do major training. We will reach out regarding legislation changes but are not in regular contact regarding training.

Program Features

Hardship license available to first offenders: Awaiting data
Hardship license available to repeat offenders: Awaiting data
Hardship license (First offenders, Repeat offenders, All): Awaiting data
Lookback period: Awaiting data
Source of funding: Offender fees
Indigent funding is available to participants: Yes
Qualification requirements for indigent funding: Below the poverty line
Frequency of interlock device service: 60 days


Participation Rate: Awaiting data
Number of interlock program participants in 2019: 1,001-2,000
Indicator used to determine the number of participants in the interlock program (e.g., certificate of device installation, certificate of device removal):
Installation of device and issuance of ignition interlock restricted license
Indicator(s) used in state as the best measure(s) of the eligible population of offenders for the interlock program to determine the program participation rate:
Number of impaired driving arrests and number of impaired driving convictions
Penalties for non-compliance: Awaiting data

Program Length

Length of Hard Suspension

1st offenders: 6 months (with BAC >.15)
2nd offenders: Indefinite, lifted by installing device
3rd offenders: Indefinite, lifted by installing device
4th and subsequent offenders: Indefinite, lifted by installing device

Interlock Program Length

1st offenders: 6 months (with BAC >.15)
2nd offenders: 24 months
3rd offenders: 36 months
4th and subsequent offenders: 48 months


Program length is extended for non-compliance: Yes
Length of extension for non-compliance: 2-4 months
Program length is reduced for compliance: No
Length of reduction for compliance: Awaiting data
Frequency of sanctions imposed for non-compliance: Occasionally
Program exit requirements: Points-based assessment


Treatment is required for the interlock program: DUI conviction or implied consent violation
Components applied to treatment: DUI conviction or implied consent violation

Data Collection & Management

Agency responsible for collecting data: Awaiting data
Overview of Data Management: We track non-ownerships, clients who do not own a vehicle can obtain a license but do not have to install an interlock device.
Barriers to data collection: Awaiting data
Vendors in State

Vendor Oversight

Number of Vendors in State: 4
Agency responsible for vendor oversight: Probation
Approval process for new vendors: Device certification application
Vendor recertification: Every 3 years
Interlock technology features (Data provided by CIIM): Camera
Radius requirement for service centers: Yes
Radius requirement: 60-miles