California DUI law is spread across many sections of the Vehicle Code, and it helps to see how they fit together. I am Joel Brand, and this is a plain-language map of the key Vehicle Code sections that come up in a DUI case, with links to a detailed article on each. Think of it as an index: a way to find the specific law that applies to your situation and understand where it sits in the larger structure of California DUI law.

How to use this map

You do not need to read every statute to understand your case, but it helps to know roughly where yours falls. Start with the core offense you are charged with, then look at whether any enhancements apply, whether a refusal is alleged, and which license consequences are in play. Each entry below links to a full article explaining that section in plain language. The goal is not to turn you into a lawyer but to give you a clear picture of the moving parts, so that when you and I discuss your case, you already understand the framework the prosecution is working within and where the pressure points are.

The core DUI offenses

Almost every DUI begins with one or both of the two main offenses, which the prosecution often charges together, plus the felony injury statute where someone was hurt.

  • VC 23152(a) - driving under the influence of alcohol (the impairment offense).
  • VC 23152(b) - driving with a BAC of 0.08% or more (the per se offense).
  • VC 23153 - DUI causing injury, which can be charged as a felony.

The (a) and (b) offenses are charged from the same drive but require different proof: (a) turns on actual impairment, while (b) turns on the chemical number, which is why challenging the test can defeat one count even if the other survives.

Penalties by offense level

The penalties escalate sharply with each prior within the ten-year window, and a separate statute governs the standard probation terms most first offenders receive.

Because the level depends entirely on the count of valid priors, examining and challenging those priors is often the single most valuable move in a repeat-offense case.

Enhancements

On top of the base offense, the prosecution can add enhancements that increase the sentence when certain facts are present.

  • VC 23578 - high-BAC sentencing factor.
  • VC 23572 - child passenger enhancement.
  • VC 23582 - excessive speed enhancement.
  • VC 23577 - refusal sentencing enhancement.

Each enhancement has its own elements the prosecution must prove, which means each is also a separate place the added exposure can be challenged.

Chemical testing and refusal

California's implied-consent scheme governs the post-arrest chemical test and the steep penalties for refusing it.

  • VC 23612 - implied consent and chemical test refusal.
  • VC 13353 - the license suspension for a refusal.

A refusal allegation roughly doubles what is at stake, but it has strict requirements, a lawful arrest and a proper admonition among them, that are frequently not met.

License suspension and the DMV

The DMV runs its own administrative track, separate from the criminal court, with its own short deadline to demand a hearing.

  • VC 13353.2 - the Administrative Per Se suspension.
  • VC 13558 - your right to a DMV hearing.
  • VC 13352 - court-ordered suspension on conviction.

The ten-day window to request the DMV hearing is the most urgent deadline in the entire case, because missing it lets the suspension take effect regardless of what happens in court.

Reductions and related charges

Many DUIs resolve through a reduction to a lesser charge, and several related Vehicle Code offenses often accompany a DUI.

A reduction to a wet or dry reckless can meaningfully lighten the record, the program, and the insurance impact, which is why these lesser charges are such important tools in negotiation.

Why knowing the right section matters

Identifying exactly which sections apply to your case is more than an academic exercise; it tells you what the prosecution actually has to prove and where it can be challenged. The (a) and (b) offenses require different proof. Each enhancement has its own elements. The refusal statutes have strict procedural prerequisites. The DMV statutes run on their own deadlines. When you know which specific provisions are in play, you know which facts matter, which records to demand, and which weaknesses to press. A defense built on the precise statutes at issue is far sharper than one aimed vaguely at "the DUI."

The Vehicle Code is only part of the picture

It is also worth remembering that a DUI case can reach beyond the Vehicle Code. Related conduct can bring in Penal Code charges such as child endangerment, or, in the most serious cases, gross vehicular manslaughter, and the DMV side is governed by its own administrative provisions. So while this map covers the core Vehicle Code sections, a complete view of a particular case sometimes includes statutes outside the Vehicle Code entirely. Part of evaluating any DUI is checking whether the conduct exposes you to charges beyond the standard driving offenses, because those companion charges can carry the heavier consequences.

How it all fits together

These sections interact constantly. The offense you are charged with, the enhancements the prosecution can prove, the chemical-test issues, and the separate DMV suspension all combine to set your exposure. No single statute tells the whole story; it is the interaction among them that determines what you are actually facing and where the best openings to fight back lie. The two guides that tie them together are my California DUI penalties guide and California DUI license guide, and the ways to fight back are in the defenses guide.

Questions about the law in your case?

Knowing which sections apply to you is the start; what matters is how they play out on your facts, which I review with you. Use the free case analysis on this page, or call me directly at (888) 271-6644. I answer my own phone, 24/7.