A first DUI arrest in Colorado doesn’t automatically place someone under the state’s scheduled nine-month interlock rule. House Bill 26-1242 takes effect June 1, 2027, and applies according to the date of the qualifying driver’s license revocation, not simply the date of the traffic stop or arrest.
That distinction matters, but an arrest still creates immediate decisions about driving privileges, court proceedings, and evidence. A criminal case and the separate Colorado DMV process can each affect a person’s ability to drive.
The June 1, 2027 Effective Date Controls
Colorado’s new interlock requirement for first-time offenders is a future change, not the rule in force on November 4, 2026. House Bill 26-1242 amends C.R.S. ยง 42-2-132.5, Colorado’s statute governing interlock-restricted licenses, effective June 1, 2027.
For covered first offenses, the law will require a driver to hold an interlock-restricted license for nine consecutive months after reinstatement before becoming eligible for another type of license. An ignition interlock device connects to a vehicle’s starting system and requires an acceptable breath sample before the vehicle starts.
The rule covers certain first convictions for DUI, DUI per se, and drug-impaired driving. DUI per se is an alcohol-related driving offense based on a blood alcohol concentration at or above Colorado’s legal limit, rather than proof of actual impairment. The act includes limited exceptions, so the driver’s license history and the basis for the revocation matter.
Most importantly, the requirement will apply according to the date of the qualifying license revocation. Someone arrested before June 1, 2027, shouldn’t assume the arrest date alone determines whether the new rule applies.
How the Law Will Change the First-Offense Path
Before June 1, 2027, some first-time drivers can complete a license revocation without installing a device, an option often described as waiting out the revocation.
Under the current framework, a driver age 21 or older who faces a nine-month revocation for DUI, DUI per se, or excess BAC can seek early reinstatement with an interlock-restricted license. In some situations, a person who doesn’t seek early reinstatement can instead serve the full revocation period.
The legislation changes that choice for qualifying revocations. Once it takes effect, reinstatement will carry nine consecutive months of interlock restriction. Waiting through the revocation will no longer avoid the post-reinstatement requirement when the qualifying revocation occurs on or after June 1, 2027.
A criminal conviction and a DMV license revocation are related but separate matters. The court handles the criminal charge, while the Colorado Department of Revenue and Colorado DMV address driving privileges through an administrative process. Reviewing both tracks early identifies which dates, allegations, and license consequences are in play.
High BAC Results & Test Refusals Carry Different Rules
A first offense doesn’t always result in a short or uniform restriction. A blood alcohol concentration of 0.15 or higher, or a chemical test refusal, can lead to a Persistent Drunk Driver designation.
That designation carries separate restrictions. Under current Colorado rules, a driver designated as a Persistent Drunk Driver must hold an interlock-restricted license for at least two years after reinstatement and isn’t eligible for early removal. These requirements are distinct from the restriction scheduled for covered first offenses.
A refusal also has separate DMV consequences because Colorado’s express-consent law treats it differently from a completed breath or blood test. For a revocation of one year or longer based on refusal, current law permits an application for early reinstatement with interlock after two months. Beginning June 1, 2027, the new act repeals that waiting period.
This change doesn’t erase the consequences of a refusal or a Persistent Drunk Driver designation. It changes when a qualifying person may seek interlock-based reinstatement. The basis for the DMV action, the test result, and the revocation date must be considered together.
Interlock Compliance, Removal & Cost Support
Using an interlock involves more than installing the device. Drivers must follow monitoring, servicing, and reporting requirements throughout the restriction period. The device can require additional breath samples while the person is driving, not only before the engine starts.
Under the current early-removal standard, four consecutive monthly monitoring periods without disqualifying excessive breath-alcohol events, tampering, or circumvention can support eligibility to remove a restriction. That standard shouldn’t be confused with the consecutive post-reinstatement period required by the 2027 law.
Cost is another practical concern. Colorado’s ignition interlock financial assistance program can provide approved first-time applicants a prorated credit of up to $400 toward future lease charges. It doesn’t make retroactive payments, so applicants should seek assistance before charges accumulate.
Beginning in 2027, the act will limit financial-assistance eligibility through income criteria and require certified manufacturers to provide certain discounts and disclosures to eligible participants. A driver considering reinstatement should account for installation, lease, monitoring, and removal obligations, not only the initial appointment.
What to Address After a First DUI Arrest Now
The future rule shouldn’t distract from deadlines that apply immediately after an arrest. A DUI arrest or refusal can start both a criminal court case and a separate DMV administrative proceeding.
For the DMV proceeding, the hearing request deadline is often seven days after an arrest or refusal. Missing it can affect driving privileges regardless of what later happens in criminal court. Review the notice provided after the arrest immediately to identify the applicable deadline and instructions.
Protect Deadlines & Preserve Evidence
Address these issues early:
- Protect the DMV deadline. Determine whether a DMV hearing request is required and submit it within the stated time.
- Separate the two cases. Track the criminal court date and the DMV process independently because one doesn’t replace the other.
- Preserve the evidence. Review the reason for the stop, field sobriety testing, testing procedures, officer reports, available body camera footage, and laboratory records.
The new law is one reason a first-offense case deserves close attention, but it isn’t the only one. The allegations, test evidence, license history, and DMV action determine which restrictions apply and when.
The practical question isn’t simply whether a device is required. It’s whether the current DMV action, criminal case, and relevant dates create a restriction now, later, or under a different rule.
We provide first-offense DUI defense in Denver and surrounding Colorado courts, including coordinated review of DMV and criminal matters. To discuss the deadlines and evidence in a specific case, contact Orr Law Firm at (303) 747-4247.