What Is the Difference Between VC 23152(a) and VC 23152(b) in California?
The difference between California Vehicle Code 23152(a) and Vehicle Code 23152(b) comes down to how prosecutors prove a DUI charge. While both laws involve driving under the influence, they focus on different types of evidence.
- VC 23152(a) makes it illegal to drive while under the influence of alcohol, drugs, or a combination of substances.
- VC 23152(b) makes it illegal to drive with a blood alcohol concentration (BAC) of 0.08% or higher.
In many California DUI cases, prosecutors file both charges at the same time because each section provides a different legal theory. One focuses on whether the driver was impaired, while the other focuses on the driver’s BAC level.
Understanding the difference between these two DUI charges can help explain why someone may be charged under one section, both sections, or why a DUI case may involve different types of evidence.
VC 23152(a): Driving Under the Influence of Alcohol or Drugs
California Vehicle Code 23152(a) prohibits a person from driving a vehicle while under the influence of alcohol.
A person may violate VC 23152(a) when alcohol, drugs, or a combination of substances affects their ability to operate a vehicle safely.
Unlike VC 23152(b), there is no specific BAC requirement for a VC 23152(a) charge. Prosecutors do not need to prove that a driver’s BAC reached a particular number. Instead, they must generally show that the driver was impaired.
Evidence that may support a VC 23152(a) allegation can include:
- Unsafe or unusual driving behavior
- Officer observations during a traffic stop
- Field sobriety test results
- Statements made by the driver
- Physical signs of impairment
- Breath or blood test results
Example of a VC 23152(a) DUI Charge
A driver is stopped after repeatedly drifting across lane lines. During the stop, the officer observes signs such as poor balance, slow responses, and difficulty completing instructions.
A breath test later shows a BAC of 0.06%.
Because the BAC is below 0.08%, the driver may not meet the requirements for a VC 23152(b) charge. However, prosecutors may still pursue a VC 23152(a) charge if they believe the evidence shows alcohol impaired the driver’s ability to operate the vehicle safely.
VC 23152(b): Driving With a BAC of 0.08% or Higher
California Vehicle Code 23152(b) focuses specifically on a driver’s alcohol concentration.
To prove a violation of VC 23152(b), prosecutors generally must establish:
- The person was driving a vehicle, and
- The person had a BAC of 0.08% or higher at the time of driving.
This is often called a “per se” DUI because the law establishes a specific BAC threshold. Unlike VC 23152(a), the prosecution does not necessarily need to prove that the driver displayed obvious signs of impairment if the BAC requirement is met.
Example of a VC 23152(b) DUI Charge
A driver is stopped for speeding. The driver answers questions normally and does not appear significantly impaired, but a chemical test shows a BAC of 0.09%.
Even if the driver believes they were driving safely, prosecutors may file a VC 23152(b) charge because the BAC measurement is above California’s legal limit.
VC 23152(a) vs. VC 23152(b): Key Differences
| VC 23152(a) | VC 23152(b) | |
|---|---|---|
| Main focus | Driver impairment | BAC level |
| Substance involved | Alcohol, drugs, or both | Alcohol |
| BAC requirement | No specific BAC required | BAC of 0.08% or higher |
| Can apply below 0.08% BAC? | Yes | No |
| Common evidence | Driving behavior, officer observations, sobriety tests | Breath or blood test results |
| Legal theory | Driver was unable to operate safely due to impairment | Driver exceeded the legal BAC limit |
Why Are People Charged With Both VC 23152(a) and VC 23152(b)?
It is common for California prosecutors to file both charges in the same DUI case.
The reason is that the two sections address different ways of proving a DUI violation:
- VC 23152(a) argues that the driver was impaired.
- VC 23152(b) argues that the driver’s BAC was 0.08% or higher.
For example, a driver may have:
- A BAC test result showing alcohol concentration above the legal limit, and
- Driving behavior or officer observations suggesting impairment.
By filing both charges, prosecutors preserve both legal theories based on the available evidence.
However, these charges usually relate to the same DUI incident. A person is generally not punished twice for the same act of driving under the influence.
Can You Get a DUI in California With a BAC Under 0.08%?
Yes. A BAC below 0.08% does not automatically prevent a DUI charge.
A person may still face a VC 23152(a) charge if alcohol or drugs affected their ability to drive safely.
Factors that may influence impairment can include:
- The amount of alcohol consumed
- The time period over which alcohol was consumed
- Body size and metabolism
- Whether drugs or medications were involved
- Driving behavior
- The total circumstances of the traffic stop
For example, a driver with a BAC of 0.06% who causes a collision or demonstrates significant impairment may still face a DUI allegation under VC 23152(a).
Can You Be Charged With DUI If Your BAC Is 0.08% or Higher but You Feel Fine?
Yes.
A person’s personal feeling of being “okay to drive” does not determine whether they can be charged under VC 23152(b).
Alcohol affects individuals differently, and someone may not recognize their own level of impairment. California’s BAC-based DUI law focuses on the measured alcohol concentration rather than whether the driver personally felt impaired.
Are VC 23152(a) and VC 23152(b) Misdemeanor Charges?
In many situations, first-time violations of VC 23152(a) and VC 23152(b) are charged as misdemeanors.
However, the consequences of a DUI case depend on many factors, including:
- Whether the person has prior DUI convictions
- Whether another person was injured
- The driver’s BAC level
- Whether drugs were involved
- Whether additional charges apply
- The circumstances surrounding the arrest
A misdemeanor DUI conviction can still result in significant legal and personal consequences.
Potential Penalties for a California Misdemeanor DUI
The consequences of a DUI conviction vary depending on the facts of the case and the driver’s history.
For a first-time misdemeanor DUI conviction, possible consequences may include:
- Court fines and penalty assessments
- DUI education programs
- Probation requirements
- Driver’s license consequences
- Ignition interlock requirements in certain circumstances
- Other court orders
Repeat DUI offenses may carry more serious penalties, including longer requirements and additional consequences.
It is also important to understand that criminal court proceedings and Department of Motor Vehicles (DMV) actions are separate processes. A person facing a DUI allegation may have both a criminal case and a possible DMV-related license issue.
What Evidence Is Used in California DUI Cases?
The evidence in a DUI case depends on whether the allegation involves VC 23152(a), VC 23152(b), or both.
Evidence Used for VC 23152(a)
Because this charge focuses on impairment, evidence may include:
- How the vehicle was being driven
- Officer observations
- Field sobriety testing
- Statements from the driver
- Video recordings
- Chemical test results
Evidence Used for VC 23152(b)
Because this charge focuses on BAC, evidence often involves:
- Breath test results
- Blood test results
- Other chemical testing evidence
Issues involving testing procedures, timing, accuracy, and handling of evidence may become important considerations in DUI cases.
Frequently Asked Questions
Is VC 23152(a) more serious than VC 23152(b)?
Neither charge is automatically more serious. They represent different methods of proving a DUI offense. The seriousness of the case depends on the facts, evidence, and circumstances involved.
Can someone be convicted of both VC 23152(a) and VC 23152(b)?
A person may be charged with both sections, but California generally does not impose two separate DUI punishments for the same act of driving under the influence.
Does a breath test automatically prove a DUI?
A breath test result can be important evidence, but DUI cases may involve questions about the accuracy, timing, and circumstances surrounding the test.
Can prescription medication lead to a DUI charge?
Yes. California DUI laws can apply when prescription medications or other drugs impair a person’s ability to drive safely.
Is every DUI in California a misdemeanor?
No. Many DUI offenses are misdemeanors, but certain circumstances, such as serious injuries or qualifying prior convictions, may result in more serious charges.
Why Understanding VC 23152(a) and VC 23152(b) Matters
Although VC 23152(a) and VC 23152(b) are both DUI charges, they involve different legal standards and different types of evidence. One focuses on impairment, while the other focuses on BAC.
Understanding which section applies can help people better understand the allegations, the evidence involved, and the legal process ahead.
Contact Southwest Legal
If you are trying to understand a DUI charge involving VC 23152(a), VC 23152(b), or both, Southwest Legal can explain the legal issues involved and provide guidance on the legal process. Understanding your rights and options early can make it easier to navigate the challenges of a DUI case.
If you have questions about your DUI charges, contact us today for a free consultation to discuss your situation and learn more about your legal options.
Disclaimer: This article is for general informational purposes only and does not constitute legal advice or create an attorney-client relationship. No attorney-client relationship is formed unless and until the firm and client enter into an agreement for legal services. Laws may change, and legal outcomes depend on the specific facts of each case. Consult a qualified attorney for advice regarding your situation.