Underage DWI in Minnesota: The "Not-a-Drop" Law

Three Different Laws

For someone under 21, three separate Minnesota laws can come into play:

• The underage consumption law — it's illegal for someone under 21 to consume, possess (with intent to drink), or purchase alcohol;
• The underage drinking-and-driving law (the "Not-a-Drop" law) — a zero-tolerance rule for driving after any drinking; and
• The regular DWI laws — which apply to drivers of every age.

The same incident can sometimes implicate more than one of these. Knowing which law a charge falls under is the first step, because the consequences are very different.

The "Not-a-Drop" Law

Minnesota's underage drinking-and-driving law (Minn. Stat. § 169A.33) makes it a misdemeanor for anyone under 21 to drive, operate, or be in physical control of a vehicle with any amount of alcohol in their body. There's no 0.08% threshold — the limit is essentially zero. As a practical matter, some agencies may not charge unless a test shows roughly 0.02% or higher (or the driver refuses), but the legal standard is zero tolerance.

A few key points about this offense:

• Parental permission is not a defense. Unlike the underage consumption law, it doesn't matter whether a parent allowed the drinking — driving after any alcohol still violates the law.
• It is not a DWI. An underage drinking-and-driving violation is a separate offense — it's not a DWI conviction.
• It does not enhance future DWIs. Because it isn't a DWI, a "Not-a-Drop" violation does not count as a prior to increase the degree or penalties of any later DWI.

License Consequences of "Not-a-Drop"

An underage drinking-and-driving violation carries license consequences in addition to the misdemeanor penalty:

• A first offense typically results in a 30-day license suspension;
• A second offense increases to about 180 days; and
• For drivers who aren't yet licensed, it can restrict their future ability to get an instruction permit, provisional license, or driver's license.

For offenders under 18, the case is generally handled in juvenile court as a serious traffic matter rather than in adult court.

When a Minor Faces a Full DWI

This is the crucial distinction: the regular DWI laws apply to everyone, regardless of age. So an under-21 driver who is actually impaired, or who is at 0.08% or more (or has certain drugs in their system), can be charged with a full DWI — exactly like an adult — with all the criminal and license consequences that carries.

So a 16- or 17-year-old who violates the 0.08% DWI law can be treated under the DWI statute and face the same penalty framework as an adult — while the lesser "Not-a-Drop" offense covers the situation where there's some alcohol but not enough for a DWI.

The Underage Consumption Law

Separate from driving, Minnesota's underage consumption law makes it illegal for a person under 21 to consume alcohol (without a recognized exception), possess it with intent to consume, purchase or attempt to purchase it, enter a liquor store or bar to buy or consume it, or misrepresent their age to buy it. There is an affirmative defense where the alcohol was provided and consumed in the household of the person's parent or guardian, with that parent or guardian's permission. (This household defense applies to the consumption law — not to driving after drinking.)

Why These Cases Matter for Young People

For a young person, an alcohol-and-driving offense can affect a license at the very start of their driving life, create a record, and carry consequences for school, jobs, and insurance. Because the difference between a "Not-a-Drop" offense and a full DWI is so significant — and because these cases turn on the specific facts and the testing — they're worth taking seriously and reviewing carefully.

Key Terms

• Not-a-Drop law: The zero-tolerance underage drinking-and-driving offense (any alcohol, under 21).
• Underage consumption law: The separate offense for under-21 drinking/possession/purchase.
• DWI: The full impaired-driving offense that applies to all ages (0.08% or impairment).
• Parental household defense: A defense to the consumption law (not to driving after drinking).
• Enhancement: A prior that raises a later DWI — a Not-a-Drop offense does not count.