Kentucky Ignition Interlock Device (IID) Requirement...

Understanding Kentucky’s Ignition Interlock Device Requirements

Kentucky has significantly expanded its ignition interlock device (IID) requirements in recent years as part of efforts to reduce drunk driving. Understanding when IIDs are required, how they work, and what your options are is essential if you have been charged with DUI in Lexington, Louisville, or anywhere in Kentucky. Clark + Harris helps DUI clients navigate ignition interlock requirements throughout the state.

What Is an Ignition Interlock Device?

An ignition interlock device is a breath-alcohol testing device installed in a motor vehicle. The device prevents the vehicle from starting if the driver’s breath alcohol concentration exceeds a pre-set limit (typically .02 BAC in Kentucky). The device also requires periodic “rolling retests” while driving to ensure the driver remains sober.

IIDs are installed by state-certified vendors and must be maintained and calibrated regularly throughout the required installation period. All activities are recorded and reported to the monitoring authority.

Kentucky IID Statutes — KRS 189A.340

Kentucky’s ignition interlock requirements are primarily set forth in KRS 189A.340. The statute establishes when IIDs are required, how long they must be installed, and what conditions apply. Recent amendments have significantly expanded IID requirements.

When Is an IID Required in Kentucky?

IIDs are required in the following situations:

Second-Offense DUI: After a second DUI conviction within 10 years, an IID is mandatory for a period of 12 months after reinstatement of driving privileges.

Third-Offense DUI: After a third DUI conviction within 10 years, an IID is mandatory for a period of 18 months after reinstatement.

Fourth-Offense DUI (Felony): After a felony DUI conviction, an IID is mandatory for a period of 30 months after reinstatement.

Aggravated First Offense: When aggravating factors are present (BAC .15+, refusal, etc.), IID is often required.

Hardship License Applications: Any driver seeking a hardship license under KRS 189A.410 must install an IID for the duration of hardship privileges.

Ignition Interlock License Program: Under KRS 189A.0105, drivers may apply for an ignition interlock license that allows driving during the suspension period in exchange for IID installation and compliance.

The Ignition Interlock License (IIL) Program

Kentucky’s Ignition Interlock License (IIL) program, established under KRS 189A.0105, allows drivers to obtain limited driving privileges during DUI suspension periods by installing an IID. This program is a significant change from older Kentucky law and provides alternatives to the traditional license suspension process.

Under the IIL program, eligible drivers can:

Apply for an IIL after a specified waiting period
Drive during suspension periods with an IID installed
Have their full license reinstated after compliance with IID requirements
Potentially have suspension time credited against the IID requirement

Waiting periods before IIL eligibility vary based on the offense. For a first-offense DUI, there is typically no waiting period. For repeat offenses, waiting periods range from 18 months to 3 years.

Costs of Ignition Interlock in Kentucky

Ignition interlock devices represent a significant financial commitment:

Installation fee: approximately $100-$200
Monthly monitoring fee: approximately $60-$100 per month
Periodic calibration fees
Removal fee at the end of the required period

Total costs typically range from $800 to $1,500 per year of IID installation. Kentucky law provides for reduced fees for individuals who qualify for indigent status under specific income thresholds.

How IIDs Work

Before the vehicle will start, the driver must provide a breath sample. If the sample shows alcohol above the threshold, the vehicle will not start and the event is recorded. At random intervals while driving, the device requires “rolling retests.” Failure to provide a retest or failure of a retest is also recorded.

All events — failed tests, missed tests, attempts to tamper with the device, etc. — are reported to Kentucky Transportation Cabinet. Tampering with an IID or allowing another person to blow for you are separate criminal offenses under KRS 189A.345.

Consequences of IID Violations

Violating IID requirements can have serious consequences:

Failed Tests: Multiple failed tests can result in extension of the IID period, termination of IIL privileges, or revocation of driving privileges.

Tampering: Under KRS 189A.345, tampering with an IID is a separate Class A misdemeanor carrying up to 12 months in jail.

Allowing Another to Blow: Having another person provide breath samples is also a separate criminal offense.

Driving a Non-IID Vehicle: Driving any vehicle without an IID during the required period can result in new criminal charges and extended license suspensions.

Medical Exceptions and Accommodations

Some individuals have medical conditions that prevent proper use of IIDs. Kentucky law provides for medical exceptions and accommodations in specific circumstances. Clark + Harris can advise whether your medical situation may qualify for an exception.

Clark + Harris DUI Representation

At Clark + Harris, we help DUI clients navigate the full range of IID-related issues. Our representation includes:

Negotiating DUI resolutions that minimize IID requirements
Applying for Ignition Interlock Licenses
Addressing IID violations and tampering allegations
Handling hardship license applications
Representing clients whose IID requirements are being extended or modified

Contact Clark + Harris

If you are facing DUI charges or IID-related issues in Kentucky, call Clark + Harris at 859-474-0001 for a confidential consultation. We serve clients throughout Kentucky from our offices in Lexington and Louisville.

Frequently Asked Questions

How soon should I contact Clark + Harris after being charged in Kentucky?

As soon as possible. Early representation protects your rights during questioning, preserves evidence, and often leads to better outcomes. Call 859-474-0001 — we respond promptly to new inquiries.

Does Clark + Harris represent clients throughout Kentucky?

Yes. We represent clients in all 120 Kentucky counties, both state District and Circuit courts, and federal courts in the Eastern and Western Districts of Kentucky.

What happens during a free consultation with Clark + Harris?

We review the specific charges and evidence, discuss available defenses, explain the likely process in the relevant court, and give you a clear roadmap of next steps — at no cost to you.

Related Resources

If this information applied to your situation, the following Clark + Harris guides may also be helpful:

Kentucky Ignition Interlock Device (IID) Requirements — Clark + Harris