If you’ve been arrested for or convicted of driving while intoxicated (DWI) in Missouri, you may be required to install an ignition interlock device (IID). Missouri law has rules for who must use an IID, how long it must stay installed, and what happens if you violate the terms.
What an Ignition Interlock Device Does
An ignition interlock device is a breathalyzer in your vehicle. You can’t start the car until you blow into the device and pass the breath test. If your blood alcohol concentration (BAC) is above the preset limit, the car won’t start. Some devices also require tests while driving to confirm you’re not drinking and driving.
The Missouri Department of Revenue oversees the IID program. Approved vendors install and monitor the devices. They also report violations directly to the state.
IIDs and Limited Driving Privileges
If your license has been suspended or revoked, you might qualify for a limited license. These privileges allow you to drive to work and school. However, you often must agree to have an IID installed to qualify for the limited license.
The application process requires filing a petition in the proper court or applying through the Department of Revenue. This usually depends on your record. Your Missouri DWI defense attorney can guide you through whether you qualify and what to do next.
When Are You Required To Use an IID?
Missouri law requires an IID in several circumstances. A court may order one as a condition of probation or parole for a DWI-related offense. For many drivers, the IID is the only way to operate a car while serving a suspension period.
You may have to install an IID if you’re classified as a “persistent” or “aggravated” offender under Missouri’s DWI statutes. That depends on the number of prior alcohol-related convictions on your record.
How Long Must the Device Stay Installed?
Your IID duration depends on your case. Missouri typically requires installation for at least three months for a first DWI. If you’re convicted of multiple DWIs or you fall into the persistent or aggravated offender category, you could be required to use the device for years.
You’re responsible for all costs associated with the IID, from installation to removal. Note that you can’t remove the IID before the Department of Revenue authorizes removal. Until you receive that notice, the device must stay installed, and you must take the breath tests as directed.
Consequences of Violating IID Rules
Missouri law allows the Department of Revenue to extend the IID installation period if you violate the IID rules. In serious cases, your limited driving privilege can be revoked entirely. You could also face additional penalties if you tamper with the device.
Violations get reported directly from the vendor to the state, so there’s very little room to argue about what happened, even if you have a skilled defense attorney. If you want your license back, follow the rules and do your best to avoid even minor mistakes.
Protect Your Rights With Our Knowledgeable DWI Defense Attorneys
Missouri has strict IID rules. A single mistake can extend the time you’re forced to install one. A lawyer who understands how the system works can explain your rights and obligations. Whether you’re applying for a limited driving privilege or challenging a violation, skilled legal guidance is the best way to protect your rights.
Travis Noble, P.C., has years of experience with DWI enforcement and defense.
Our firm defends clients across Missouri and can help you with your IID requirements. If you have questions after a DWI arrest or conviction, contact us today to find out how we can help.