Vehicle Code § 23140 VC -Underage DUI with a BAC of 0.05 or Higher
Table of contents
Click To travel To Chapters
1. What is Underage DUI with a BAC of 0.05 or Higher?
2. What are examples of Underage DUI with a BAC of 0.05 or Higher?
Under California Vehicle Code § 23140 VC, any driver under the age of 21 who operates a vehicle with a blood alcohol concentration (BAC) of 0.05% or higher can face underage DUI charges. While this BAC level may seem low compared to the adult limit of 0.08%, the law is intentionally strict to discourage underage drinking and driving.
Here are some real-world examples that show how this law applies:
Example 1: Leaving a Party After a Few Drinks
A 20-year-old attends a college party and consumes two small glasses of wine. On the way home, the driver is pulled over for rolling through a stop sign. After administering a breathalyzer test, officers find the driver’s BAC is 0.06%.
Even though the driver doesn’t appear severely impaired and the BAC is under the adult limit, this still qualifies as an underage DUI under VC 23140.
Example 2: Driving After “Just One Beer”
A 19-year-old has a single beer with friends at a restaurant. On the way home, police stop the car for a broken taillight. A chemical test shows a BAC of 0.05% exactly.
Because the driver is under 21, this meets the threshold for underage DUI charges.
Example 3: After a Sporting Event
A group of underage friends tailgate before a baseball game. One of them, age 18, drinks two seltzers and later drives home. He is pulled over for speeding and blows a 0.07% BAC.
This situation not only violates VC 23140 but could also escalate to a standard DUI under VC 23152 if the driver shows clear signs of impairment.
Example 4: Prescription Medication Mixed with Alcohol
A 20-year-old college student takes prescription anxiety medication, then consumes a single cocktail at dinner. While driving afterward, they are stopped for weaving. A chemical test reveals a BAC of 0.05%.
The alcohol alone meets the threshold for VC 23140, but the combination of alcohol and prescription medication can further increase impairment concerns.
Example 5: Holiday Celebrations
A driver who is 20 years old attends a family holiday gathering and drinks champagne for a toast. On the way home, they are stopped at a DUI checkpoint and blow a 0.055% BAC.
Despite minimal alcohol consumption, this still qualifies as underage DUI under Vehicle Code 23140 VC.
3. What are the penalties for Underage DUI with a BAC of 0.05 or Higher?
Violating California Vehicle Code § 23140 VC can have serious consequences, even though it is considered an infraction rather than a misdemeanor or felony. For drivers under the age of 21, even a blood alcohol concentration (BAC) of 0.05% or higher is enough to trigger penalties.
These penalties are designed to discourage underage drinking and driving, protect public safety, and hold young drivers accountable.
Primary Penalties for VC 23140 Violations
If convicted of underage DUI with a BAC of 0.05% or higher, an individual may face:
1. Driver’s License Suspension
The California DMV will suspend the driver’s license for one year.
If the driver does not yet have a license, the ability to obtain one may be delayed.
2. Fines and Court Costs
A base fine of $100 may be imposed for a first offense.
Additional court fees and penalty assessments can increase the total amount owed.
3. Mandatory Alcohol Education Program
Drivers between 18 and 20 years old may be required to complete a three-month alcohol and drug education program.
These courses must be completed at the driver’s own expense.
4. Impact on Driving Record
A conviction under VC 23140 will appear on the driver’s criminal record and DMV driving history.
This can affect insurance rates, employment opportunities, and future background checks.
Additional Consequences
Although VC 23140 is an infraction, it can lead to other related consequences, including:
Insurance Rate Increases: Car insurance companies may significantly raise premiums or cancel coverage after an underage DUI.
Future DUI Charges: A VC 23140 conviction counts as a prior offense. This means if the driver is later charged with a standard DUI, the penalties may be more severe.
School or Employment Consequences: Colleges, scholarships, and employers may take disciplinary action against individuals with DUI-related convictions.
Comparison to Other Underage DUI Laws
4. What are legal defenses for Underage DUI with a BAC of 0.05 or Higher?
Facing an underage DUI charge under California Vehicle Code § 23140 VC can feel overwhelming, especially since even a small amount of alcohol can result in penalties. However, being charged does not automatically mean a conviction. With the right legal strategy, it is often possible to fight the allegations and protect your record.
At Grace Legal Group, our DUI defense attorneys have successfully defended countless underage clients by identifying weaknesses in the prosecution’s case. Below are some of the most effective defenses against VC 23140 charges.
1. The BAC Test Was Inaccurate or Faulty
Breathalyzers and chemical tests are not foolproof. Common issues include:
Improper calibration of the device
Faulty testing equipment
Improper administration of the test by law enforcement
Residual mouth alcohol (from mouthwash, medication, or burping) leading to artificially high BAC readings
If the accuracy of the BAC test is challenged, the evidence may be thrown out, weakening the prosecution’s case.
2. The Traffic Stop Was Unlawful
Police officers must have reasonable suspicion or probable cause to stop a driver. If an officer pulled you over without justification — for example, stopping you simply because of your age or appearance — the stop may be ruled unconstitutional.
Any evidence gathered from an unlawful stop (including BAC test results) can be suppressed.
3. Rising Blood Alcohol Defense
Alcohol levels in the bloodstream rise over time after drinking. If you consumed alcohol shortly before driving, your BAC may have been below 0.05% while driving but rose to above the legal limit by the time you were tested.
This defense argues that you were not legally in violation at the time you were actually behind the wheel.
4. You Were Not Driving the Vehicle
VC 23140 requires proof that the defendant was operating a motor vehicle. If you were sitting in a parked car, sleeping it off, or were not actually driving, you may have a valid defense.
5. Testing Procedure Errors
Police officers must follow strict procedures when conducting chemical tests. Common mistakes include:
Failing to observe the driver for the required 15-minute observation period before testing
Mishandling or improperly storing blood samples
Administrative errors in documenting results
Procedural mistakes can create reasonable doubt in the case.
6. Medical or Physiological Conditions
Certain medical conditions can interfere with BAC test results. For example:
Acid reflux or GERD can cause alcohol vapors to affect breath tests
Certain diets (like keto) can produce ketones, which may be misread as alcohol
Medications can impact results or mimic signs of impairment
our clients say it best
Client Testimonials
5. What are related offenses to Underage DUI with a BAC of 0.05 or Higher?
Protecting Your Rights, Defending Your Future
Get in touch with our lawyers today to schedule a consultation and learn how we can help you. We are here to answer your questions and provide you with the support you need during this difficult time.
Client Satisfaction Is Priority
function myFunction() { document.getElementById("text").innerHTML = "Facing criminal charges can be overwhelming. It is our job to make the process as clear as possible and lessen the burden on you. Although achieving success is a team effort, we work for you and do not consider the job done until the results bring peace to you and your loved ones."; document.getElementById("btn").style.display = "none"; }
You Are More Than What They Say
function myFunction1() { document.getElementById("text1").innerHTML = "Human beings are much more than what the prosecution may accuse them of. The prosecution sees over 100 criminal defendants in a day. Our clients must stand out among the rest. To do that, our firm creates mitigation packets to give to the prosecutor and the court. Your version of events, our legal analysis, evidence that can support our defense, letters of character, community engagement, and much more is included in this mitigation packet. We have effectively changed the way the prosecution works with clients who come from Grace Legal Group."; document.getElementById("btn1").style.display = "none";}
We Always Go The Extra Mile
function myFunction11() { document.getElementById("text11").innerHTML = "The police are not perfect. So to combat this, our investigative team of former law enforcement examines and reviews every aspect of the case leaning on every ounce of their prior experience. This allows for a thorough analysis of Strengths, Weaknesses, Opportunities, and Threats. Legal Motions are regularly drafted and submitted throughout the process to hold both the police and the prosecutor accountable. The Constitution must be upheld in other courts."; document.getElementById("btn11").style.display = "none"; }