Getting stopped on suspicion of DUI puts most people on edge immediately. One of the first questions that comes up is whether the driver actually had to submit to a breath test at all. The answer is not a flat yes or no. It depends on which type of test the officer is asking for, when in the process the request is being made, and what the driver's specific situation is at the time of the stop.
California law treats those two moments very differently, and the difference carries real legal weight. Knowing where that line falls can change how you respond during a stop and what a criminal defense lawyer can do with the case afterward.
What California's Implied Consent Law Actually Requires
California Vehicle Code Section 23612 is the state's implied consent statute. By operating a vehicle on California roads, every driver is deemed to have consented to a chemical test of their blood or breath if they are lawfully arrested for DUI. That consent applies automatically under the law. There is no separate agreement or signature required for it to take effect.
Once a lawful arrest has been made, completing a chemical test is required. A driver can typically choose between a breath test and a blood draw, but refusing both options is treated the same as a flat refusal under the statute. The consequences that follow are handled through the DMV in a process that runs alongside the criminal case, and they begin regardless of how the criminal case eventually resolves.
The Two Different Tests and What Each Means
Before an arrest, a California officer may ask a driver to submit to a Preliminary Alcohol Screening test, commonly called a PAS test. The PAS test is the portable handheld device used at the roadside. For most adults who are 21 or older and not currently on DUI probation, the pre-arrest PAS test is voluntary. You can decline it at that stage without triggering the penalties that come with refusing the post-arrest chemical test.
Once an arrest has been made, the situation is different. The post-arrest chemical test is the one governed by implied consent, and officers are required by law to advise you of the consequences before asking for it. What you say and do at that moment affects both your license and how the prosecution may build its case against you going forward.
What Happens When Someone Refuses a Chemical Test
Refusing the post-arrest chemical test triggers an automatic license suspension through the DMV. A first refusal carries a one-year suspension. A second refusal within 10 years carries a two-year suspension, and a third refusal within 10 years results in a three-year suspension. These suspensions apply through the administrative process, separately from any criminal penalties.
A refusal can also be introduced as evidence at trial. California prosecutors are permitted to argue that a defendant who refused a chemical test did so because they knew their BAC was over the legal limit. That argument does not guarantee a conviction, but it gives the prosecution a tool that would not exist in a case where the defendant submitted to the test. We keep that in mind from the moment we first start reviewing a refusal case.
Does Refusing Actually Help Your Defense
Most of the time, no. The idea that refusing a breath or blood test makes a DUI case impossible for the prosecution to prove is a widespread misconception. The automatic suspension from a refusal is typically longer than the suspension that follows a standard DUI conviction. The refusal itself becomes part of the prosecution's presentation. And without a chemical test result to examine, the defense loses one of its most useful tools for attacking the evidence directly.
That said, certain facts change the analysis. If the officer lacked legal justification for the arrest itself, everything that followed may be challengeable on Fourth Amendment grounds regardless of whether a test was taken. If the implied consent advisements were not properly given before the chemical test was requested, that procedural failure becomes a defense issue. We look for both of those problems in every refusal case we handle, and they are the first two things any DUI attorney should check after a refusal.
How We Approach DUI Cases in West Covina and Los Angeles County
Every DUI case we take on starts with a close review of the stop, the arrest, and every piece of evidence collected. Tammy Higgins spent 16 years as a public defender across Orange County, Los Angeles County, and San Bernardino County and has taken more than 100 criminal cases to jury verdict. Her background shapes how we read DUI evidence, whether the case involves a chemical test result or a refusal.
We look at the calibration and maintenance records for any breath testing device, the storage and handling documentation for blood draws, and the step-by-step procedures the officer followed from the moment the vehicle was pulled over. When something does not line up with what the law requires, we build on it. That is where the defense lives in these cases.
Contact Us
If you or a family member is facing a DUI charge in West Covina or anywhere in Los Angeles County, we are available 24 hours a day, 7 days a week. Call SoCal Defense Lawyer at 949-226-7602 for a free, confidential consultation with no obligation to retain our firm.
Frequently Asked Questions
What is the 10-day rule after a DUI arrest in California?
After a DUI arrest in California, you have 10 days to request a DMV Administrative Per Se (APS) hearing to contest the suspension of your driver's license. If you do not request the hearing within 10 days, the DMV will automatically suspend your license. An attorney can request this hearing on your behalf and represent you in both the DMV proceeding and the separate criminal case in court.
Can criminal charges be dismissed before trial in California?
Yes. Charges can be dismissed when evidence was obtained through an unlawful search or stop, when the prosecution lacks sufficient evidence to proceed, when a defendant successfully completes a diversion program, or when procedural errors affect the case. A defense attorney reviews all of these factors before advising on whether to negotiate, challenge the charges, or take the case to trial.
What is the difference between a PAS test and a post-arrest chemical test?
The PAS test is the portable breathalyzer used at the roadside before an arrest. For most drivers over 21 who are not on DUI probation, it is voluntary. The post-arrest chemical test is the breath or blood test administered after a lawful DUI arrest, and it is mandatory under California Vehicle Code 23612. Refusing the post-arrest chemical test carries automatic DMV suspension consequences that refusing the pre-arrest PAS test does not.
Does a refusal automatically mean I will lose my license?
A refusal triggers an automatic DMV suspension, but the process includes a hearing where the circumstances can be contested. Requesting that hearing within 10 days of the arrest is the necessary first step. The outcome depends on the specific facts of your case, including whether the officer properly followed the required advisement steps before making the request.
How can a DUI attorney help after a refusal?
There is still a defense to build. We look at whether the arrest was lawful, whether the implied consent advisements were given correctly, and whether any procedural problems exist in the case. A refusal does not close off every available avenue, and a thorough review of the facts is always where we start.
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