Alaska DUI Laws — AS 28.35.030, IID & 72-Hour Jail Rule

Alaska DUI Laws Explained

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An Alaska DUI charge under Alaska Statute §28.35.030 triggers two parallel processes: a criminal case in district court and an administrative license revocation by the Alaska DMV. Both move quickly, both have separate timelines, and both have to be answered separately. Alaska is one of the most aggressive states on first-offense DUI, with mandatory 72-hour minimum jail, mandatory ignition interlock for any conviction, and significant base fines.

The legal threshold

Alaska's per-se DUI thresholds:

  • Adults 21+: 0.08% BAC.
  • Drivers under 21: 0.00% BAC under Alaska's zero-tolerance law — any detectable alcohol triggers consequences.
  • Commercial drivers (CDL): 0.04% BAC.
  • Aggravated DUI: 0.16% BAC or higher carries enhanced minimum penalties.

Alaska also charges DUI on impairment evidence below the 0.08% threshold under AS §28.35.030 — the prosecution must prove the driver was "under the influence" of alcohol, drugs, or controlled substances regardless of measured BAC.

Implied consent and chemical testing

Alaska's implied consent law requires every driver to submit to chemical testing (breath, blood, or urine) when lawfully arrested for DUI. Refusing the test is itself a separate crime in Alaska — not just an administrative consequence. A first-offense refusal carries the same minimum jail and fine as a first-offense DUI plus a longer license revocation. The dual-charge structure makes Alaska one of the few states where refusing the test isn't strategically helpful.

Administrative license revocation

After a DUI arrest where the BAC was 0.08% or higher (or the driver refused testing), the arresting officer typically takes the driver's Alaska driver's license and issues a 7-day temporary permit. The administrative revocation begins on day 8:

  • 90-day revocation for a first BAC failure.
  • 1-year revocation for a first chemical-test refusal.
  • 1-year revocation for a second BAC failure within 15 years.
  • 3-year revocation for a third offense.
  • Lifetime revocation for a fourth offense (with a 10-year limited license petition available).

The driver has 7 days from arrest to request an administrative hearing with the Alaska DMV's Driver Improvement section. The hearing is separate from any criminal proceeding and addresses three narrow questions: whether the officer had lawful cause to stop and arrest, whether the BAC was 0.08% or higher, and whether the driver lawfully took the test or refused.

First-offense criminal penalties

A first-offense DUI conviction in Alaska is a misdemeanor under AS §28.35.030, carrying:

  • Minimum 72 hours in jail (mandatory, cannot be suspended) — Alaska is one of the few states with a mandatory minimum jail term on first offense.
  • $1,500 minimum fine, plus court costs that often raise the total to $2,500-$3,500.
  • 90-day administrative license revocation (running concurrently with court-imposed revocation in most cases).
  • Mandatory completion of an Alcohol Information School.
  • A substance abuse evaluation and any recommended treatment.
  • Mandatory ignition interlock device (IID) for at least 6 months on every vehicle owned or driven.
  • SR-22 financial responsibility filing for 5 years — see our Alaska car insurance guide.
  • Probation up to 1 year.

Ignition Interlock Devices (IID)

Alaska is one of the few states that requires an IID on every DUI conviction, regardless of BAC level. The device is installed on every vehicle owned or driven by the offender at the offender's expense (typically $70-$120/month plus a $100-$150 install fee). The IID prevents the vehicle from starting if the driver's breath shows alcohol at or above the device threshold (typically 0.02%). The IID also conducts rolling tests during the drive; failed rolling tests trigger reports to the DMV and may extend the IID period.

Aggravating factors

Alaska penalties escalate when:

  • BAC 0.16% or higher — aggravated DUI with longer mandatory minimum jail, higher fines, longer IID requirement.
  • An accident with property damage or injury.
  • A child under 16 in the vehicle (separate child-endangerment charge).
  • Refusing a chemical test.
  • A prior DUI within the 15-year lookback window.
  • Driving with a license already suspended for DUI.

Repeat offenses

Alaska's DUI lookback window is 15 years — meaning a DUI from 14 years ago counts as a prior for sentencing on a new DUI. Repeat penalties:

  • Second offense within 15 years: minimum 20 days jail, $3,000 fine, 1-year revocation, IID for 1 year, mandatory treatment.
  • Third offense within 15 years: 60 days minimum jail, $4,000 fine, 3-year revocation, IID for 3 years, mandatory treatment.
  • Fourth offense within 15 years: charged as a felony, up to 5 years state prison, lifetime revocation with limited 10-year petition.

Underage zero-tolerance

Drivers under 21 with any detectable alcohol face an automatic license revocation under Alaska's zero-tolerance law. First offense: 90-day revocation. Second offense: 1-year revocation. These are administrative actions handled through the Alaska DMV's Driver Improvement section, separate from any criminal DUI charge. See our Alaska provisional license guide for the full underage rules.

Official sources

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