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Understanding South Carolina's Ignition Interlock Requirements: What Every Driver Needs to Know

Burns & Burns Law Firm · October 29, 2026

Understanding South Carolina's Ignition Interlock Requirements: What Every Driver Needs to Know

The New Reality of DUI Charges in South Carolina

If you have been arrested for a DUI in South Carolina, you are likely feeling overwhelmed by the potential consequences. At Burns & Burns Law Firm in Rock Hill, SC, we frequently speak with clients who are surprised to learn that the rules regarding driving privileges have undergone a major shift. As of May 19, 2024, South Carolina moved to an 'all-offender' ignition interlock law. This means that the days of ignition interlock devices (IIDs) being reserved only for repeat offenders are over. Today, a conviction for a first-offense DUI carries a mandatory requirement to participate in the Ignition Interlock Device Program.

What is an Ignition Interlock Device?

A Breath Alcohol Ignition Interlock Device (BAIID) is a small, handheld breathalyzer wired directly into your vehicle’s ignition system. Before your car will start, you must provide a breath sample. If the device detects a breath alcohol concentration (BrAC) at or above 0.020%, the vehicle will not start. These devices are designed to prevent impaired driving by ensuring that the driver is sober before they ever pull out of the driveway.

How Long Are You Required to Use the Device?

The duration of your participation in the program depends on your specific offense history. Because our team includes former law enforcement and former prosecutors, we understand how these administrative requirements interact with your criminal case. The state-mandated minimums are as follows:

  • First offense: 6 months
  • Second offense: 2 years
  • Third offense: 3 years
  • Fourth or subsequent offense: Lifetime requirement

It is important to note that these are minimums. If you are facing a third offense that occurred within five years of your first, the requirement increases to four years. Additionally, felony DUI cases involving great bodily injury or death carry their own specific, longer-term requirements.

The Process: From Arrest to Reinstatement

The path to getting back on the road is not automatic. Once you are subject to these requirements, you cannot simply continue driving as you did before. You must enroll in the Alcohol and Drug Safety Action Program (ADSAP) and obtain an 'II' restricted license from the South Carolina Department of Motor Vehicles (SCDMV). You are required to have the device installed on any vehicle you intend to operate. If you drive a work vehicle, you may need to seek an employer exemption through the SCDMV, though this is not guaranteed.

Why Experienced Legal Guidance Matters

Many people assume that because the law is clear, there is no room to fight a DUI charge. However, our background as former prosecutors and law enforcement officers gives us a unique perspective on how these cases are built—and how they can be challenged. We know that police procedures, breathalyzer maintenance, and the details of the traffic stop itself are all subject to strict legal standards. If those standards were not met, it could impact the outcome of your case, including whether you are ultimately required to participate in the interlock program.

Navigating the administrative side of a DUI, such as the implied consent suspension and the interlock program, is just as critical as the criminal court proceedings. At Burns & Burns Law Firm, we help our clients in Rock Hill and the surrounding areas understand the full scope of their situation. We examine every piece of evidence to ensure your rights are protected at every stage, from the initial stop to the final resolution of your case. You do not have to face these complex requirements alone; having a team that understands both sides of the courtroom can make a significant difference in how you move forward.

Have Questions About Your Case?

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Don't Face Criminal Charges Alone

South Carolina has strict statutes of limitations and early action matters. Contact Burns & Burns today for your free, confidential consultation with an attorney who has been on both sides of the courtroom.

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