DUI Based on BAC .08% or Greater – California Vehicle Code § 23152(b) VC

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Strong Legal Representation for BAC DUI Charges in California

Being charged under VC 23152(b) is different from a standard DUI charge in one critical way, the prosecution does not need to prove you were impaired. They only need to prove your BAC was at or above 0.08 percent at the time of driving and the chemical test result is typically their entire case. Most defendants facing this charge see it filed alongside VC 23152(a) on the same complaint creating a two-count DUI where each charge requires a different defense approach. At The Law Offices of Arash Hashemi our criminal defense attorney has spent over 20 years defending clients against BAC DUI charges throughout Los Angeles County. Contact our office today at (310) 448-1529 for a free confidential consultation.

What Is the Difference Between VC 23152(a) and VC 23152(b)?

The two charges target different things and understanding the distinction shapes everything about the defense strategy.

VC 23152(a) is the impairment charge. The prosecution must prove alcohol actually affected your ability to drive regardless of what your BAC measured. Someone can be convicted under this subsection with a BAC below 0.08 percent if the prosecution establishes impairment through driving behavior, field sobriety test performance, and officer observations.

VC 23152(b) is the per se charge. The only question is whether your BAC was at or above 0.08 percent at the time of driving. No proof of actual impairment is required. A driver who showed no outward signs of impairment can still be convicted if the chemical test result meets the threshold.

The reason both charges are almost always filed together is that they can each succeed or fail independently. A defendant can be acquitted on the impairment count and convicted on the BAC count or vice versa. Each charge requires its own defense analysis from the outset.

Can You Be Charged With DUI If Your BAC Was Under 0.08%?

Yes. A BAC below 0.08 percent does not prevent a DUI charge under VC 23152(a). The per se limit under 23152(b) only applies to that specific subsection. Under 23152(a) the prosecution can pursue a conviction based on impairment evidence alone regardless of the BAC result. This is why defendants who test below the legal limit are still arrested and charged when their driving behavior, field sobriety test performance, or physical appearance suggested impairment. A BAC test result below 0.08 is not a guaranteed defense to a DUI charge in California.

How BAC Is Measured in California DUI Cases

The two primary methods of measuring blood alcohol content in California DUI cases are breath testing and blood testing. Breath testing using an evidential breathalyzer is the most common method used at the station following arrest. Blood testing is more accurate and produces a sample that can be independently tested by the defense. Urine testing is rarely used and only when both breath and blood testing are unavailable.

The rising BAC defense is one of the most important concepts in 23152(b) cases. Alcohol continues to be absorbed into the bloodstream after consumption stops. When a defendant’s BAC was still rising at the time of the chemical test their actual BAC at the time of driving may have been lower than the test result reflects. When the timeline between the last drink, the time of driving, and the time of testing supports a rising BAC theory our criminal defense attorney presents that evidence directly to challenge whether the defendant’s BAC was actually at or above 0.08 percent while they were driving.

Penalties for a VC 23152(b) Conviction in California

A first offense carries 48 hours to 6 months in county jail, fines and assessments totaling approximately $1,500 to $2,000, a 6-month license suspension, completion of a 3-month DUI program, and mandatory ignition interlock device installation. The consequences compound significantly with each subsequent conviction within a 10-year period:

  • Second offense: 96 hours to one year in county jail, 18-month DUI program, 2-year license suspension
  • Third offense: 120 days to one year in county jail, 30-month DUI program, 3-year license suspension
  • Fourth offense or any DUI causing injury: can be charged as a felony carrying 16 months to 3 years in state prison

Every conviction regardless of whether it is a first or subsequent offense results in a permanent criminal record that affects employment, professional licensing, and immigration status for non-citizens.

How We Defend VC 23152(b) BAC Charges in Los Angeles

The chemical test result is the foundation of every 23152(b) prosecution and it is subject to significant challenge. Breathalyzer devices must be properly calibrated and maintained according to strict Title 17 regulations and calibration records are subject to subpoena. When the device was not properly maintained or the test was not administered correctly the reliability of the result is compromised. Blood samples must follow an unbroken chain of custody from the draw through laboratory analysis and when that chain is broken the integrity of the result can be challenged. When the blood draw was conducted without a valid warrant or proper consent the results may be suppressible entirely.

Mouth alcohol contamination can cause a falsely elevated breath test result when residual alcohol from burping, belching, acid reflux, or dental work is present in the mouth at the time of the test. GERD and diabetes can also affect breath test results. Our criminal defense attorney examines every aspect of the testing procedure and the defendant’s medical history in every 23152(b) case. When the stop itself lacked reasonable suspicion the entire case is built on an unlawful foundation and a suppression motion can result in dismissal.

Frequently Asked Questions About VC 23152(b) Charges

What happens if you register 0.08% on a BAC test in California? A result of 0.08 percent or higher supports a per se DUI charge under VC 23152(b) without any additional proof of impairment. The prosecution can proceed on that result alone alongside the VC 23152(a) impairment charge.

Can a BAC test result be challenged in court? Yes. Breathalyzer calibration, blood sample chain of custody, testing methodology, mouth alcohol contamination, and medical conditions that affect test results are all subject to challenge. A successful challenge to the reliability of the chemical evidence can result in dismissal or reduction of the charge.

What is the legal BAC limit for driving in California? The standard limit is 0.08 percent for non-commercial drivers 21 and older. Commercial drivers are held to a 0.04 percent limit. Drivers under 21 are subject to a 0.01 percent limit under the zero tolerance law.

Can you get a DUI with a BAC under 0.08%? Yes under VC 23152(a). The impairment charge does not require a specific BAC level and the prosecution can establish impairment through driving behavior, field sobriety test performance, and officer observations regardless of the BAC result.

Contact a Los Angeles DUI Attorney for VC 23152(b) Charges 

Attorney Arash Hashemi has defended clients against BAC DUI charges throughout Los Angeles County for over 20 years. He understands how to challenge breathalyzer and blood test evidence, how to present the rising BAC defense effectively, and where the defense has the most leverage at every stage. You work directly with Attorney Hashemi at every stage from the first consultation through resolution. Contact our office today for a free confidential consultation.

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