How California Underage DUI Rules Work
Drivers under 21 face stricter alcohol rules than adults. California underage DUI law has three layers: a 0.01 zero tolerance rule, a 0.05 rule and the adult DUI statutes. A young driver can face more than one at the same time.
The DMV DUI page says a driver under 21 whose screening or chemical test shows 0.01 or more faces a one year suspension. That is a DMV action, separate from any court case.
The 0.01 Zero Tolerance Rule
Vehicle Code section 23136 makes it unlawful for a person under 21 to drive with a blood alcohol concentration of 0.01 or more. A preliminary alcohol screening test or other chemical test can measure it.
That section also says drivers under 21 consent to screening when lawfully detained. A refusal can bring a suspension or revocation of one to three years.
The 0.05 Rule
Vehicle Code section 23140 makes it unlawful for a person under 21 to drive with 0.05 or more. The court clerk must send an abstract of the finding to the DMV within 10 days.
A 0.05 charge is a court matter. As a result, it differs from the zero tolerance rule, which works mainly through the DMV.
Adult Rules Still Apply in California Underage DUI Cases
Neither rule blocks a charge under the main DUI statute. Section 23136 says so directly. A young driver at 0.08 or with clear impairment can face a 23152 charge too.
The article on 23152a versus 23152b explains those adult counts.
California Underage DUI and the DMV
The DMV acts quickly in these cases. Its page also notes that the reissue fee stays at $100 for drivers under 21 suspended under the zero tolerance law. Drivers can request a DMV hearing within 10 days of receiving the notice.
The guide on DMV DUI hearing deadline explains that window.
Drivers Without a License Yet
Some young people also drive without a license. For a person under 21 who does not yet have a license, Vehicle Code section 13557(b)(3) says the DMV shall delay issuance of that license for one year when it sustains the APS findings. The article on juvenile DUI California cases covers what changes when the driver is a minor.
Next Steps for Families
Families should read every notice and note every date. They should also avoid calling the charge minor, because a California underage DUI case can affect insurance, school and future licensing. A lawyer can explain which rule applies and how the court and DMV paths fit together.