If you’re a civilian who got a DUI on a military base, your case will be prosecuted in federal court under the DUI laws of the state surrounding the installation, and the consequences will reach beyond the courtroom to your on-base access, your home-state driver’s license, and your permanent record. Military installations sit on federal land, so a state prosecutor cannot touch the case. A U.S. Magistrate Judge will.
Why the Case Is Federal, Not State
Congress has never enacted a standalone federal DUI statute. It fills the gap through the Assimilative Crimes Act, which says that conduct on federal land that would be a crime under the surrounding state’s law is treated as an equivalent federal offense carrying equivalent penalties.1Office of the Law Revision Counsel. 18 USC 13 – Laws of States Adopted for Areas Within Federal Jurisdiction Your BAC thresholds, the elements of the offense, and the sentencing ranges all come from state law. The courthouse, the prosecutor, the judge, and the record are federal.
The Act also treats any penalty the state imposes for impaired driving, whether through a court or an administrative agency, as a “punishment provided by that law” for federal purposes. Driving restrictions imposed under this provision apply only within federal territorial jurisdiction, not on public roads off the base.1Office of the Law Revision Counsel. 18 USC 13 – Laws of States Adopted for Areas Within Federal Jurisdiction That matters because the court’s license-related penalties, the base’s administrative action, and whatever your home state eventually does all operate on separate tracks.
The Stop and the Chemical Test
Military Police, DoD civilian police, or base security personnel handle the stop. They can run field sobriety tests and request a chemical test the same way a state trooper would. The critical point is consent: anyone who drives onto a military installation has, by federal regulation, already given implied consent to a blood, breath, or urine test when lawfully stopped on suspicion of impaired driving.2eCFR. 32 CFR 634.8 – Implied Consent to Blood, Breath, or Urine Tests
You can refuse. The refusal itself can be used against you in the federal case, and it triggers an immediate suspension of your on-base driving privileges before any judge sees the file. If the officer has probable cause after the investigation, you’ll be arrested.
What Happens in Federal Court
After the arrest you’ll typically receive a DD Form 1805, the federal violation notice used on military installations. It functions as both the citation and the document that initiates proceedings in U.S. District Court, and it sets a mandatory appearance date when the charge requires one.3eCFR. 32 CFR 1290.9 – DD Form 1805
A standard DUI is a misdemeanor, so the case is normally heard by a U.S. Magistrate Judge rather than a District Judge.4Office of the Law Revision Counsel. 18 USC 3401 – Jurisdiction of United States Magistrate Judges The arraignment comes first. From there the case moves through federal procedural rules, which differ from state court on discovery timelines and evidentiary standards. If your only prior experience with DUI was in state court, don’t assume anything will feel the same.
The Penalties You’re Exposed To
Because the Assimilative Crimes Act borrows state penalties, your exposure depends on which state surrounds the base. A typical first offense without aggravating factors brings fines from several hundred to a few thousand dollars, potential jail time from a few days up to six months or a year, mandatory alcohol education or treatment, a period of probation, and sometimes an ignition interlock requirement. Repeat offenses and high BAC levels push these numbers up sharply.
Federal law adds one enhancement that doesn’t exist in every state. If a child under 18 was in the vehicle and the surrounding state’s DUI law doesn’t already enhance the sentence for that fact, the federal court can add up to one year of imprisonment. If the child suffered serious bodily injury, the enhancement rises to five years. If the child died, ten years.1Office of the Law Revision Counsel. 18 USC 13 – Laws of States Adopted for Areas Within Federal Jurisdiction This stacks on top of the assimilated state penalty.
Most first-offense convictions include supervised probation managed by a U.S. Probation Officer. At minimum the court must order you to commit no new crimes, avoid unlawful controlled substances, and submit to drug testing.5Office of the Law Revision Counsel. 18 USC 3563 – Conditions of Probation Judges routinely add alcohol abstention, counseling, community service, and travel restrictions. Violating any condition can send you to jail.
What the Base Does on Its Own
Separate from the court case, the installation imposes its own administrative action, and it moves fast. Your on-base driving privilege can be suspended immediately while the case is pending, before any conviction. Federal regulations list the triggers:
- Refusing a lawfully requested blood, breath, or urine test.
- Operating a vehicle at a BAC of 0.08 or above, or otherwise violating the assimilated state’s DUI law.
- A BAC between 0.05 and 0.08, if the surrounding state suspends licenses at that level.
- An arrest report or official record documenting an impaired-driving stop.
If the case ends in a conviction or administrative license action, your on-base driving privileges must be revoked for at least one year. Refusing the chemical test also carries a mandatory one-year revocation, whether or not you’re ultimately convicted of DUI.6eCFR. 32 CFR 634.9 – Suspension or Revocation of Driving or Privately Owned Vehicle Registration Privileges
In serious cases the installation commander can issue a barment order banning you from the installation entirely. That authority is discretionary.7eCFR. 32 CFR 809a.5 – Barment Procedures If you work on the base, live there as a family member, or rely on base facilities, the barment can disrupt your life more than the sentence does.
What It Does to Your State Driver’s License
The federal conviction will not stay on the base. The National Highway Traffic Safety Administration runs the National Driver Register, which tracks people whose driving privileges have been suspended, revoked, or denied, along with serious traffic convictions.8National Highway Traffic Safety Administration. National Driver Register (NDR) When your home state checks that database, the federal DUI shows up.
Most states then take their own administrative action against your state license, treating the federal conviction the same way they’d treat an out-of-state DUI. That’s a separate suspension or revocation on top of what the federal court and the installation have already imposed. The length depends on your state’s rules and your driving history. This layering is the piece most civilians don’t see coming.
The Federal Criminal Record
A conviction here creates a federal criminal record, maintained by the FBI, which appears on standard background checks. State DUI convictions are often eligible for expungement or sealing after a period of good behavior; federal convictions are not. There is no general federal expungement statute for misdemeanors, and the narrow pathways that do exist are rarely granted.
The record follows you into job applications, professional licensing, housing, and immigration proceedings. For a civilian who drove onto a base to visit someone, this long tail is often the part of the outcome that lasts longest.
If You Have a Security Clearance
A DUI conviction triggers scrutiny under Adjudicative Guideline G, which governs alcohol-related conduct in security clearance decisions. A DUI is specifically listed as a disqualifying condition, classified as an “alcohol-related incident away from work,” regardless of your drinking patterns or any diagnosis.9Center for Development of Security Excellence. Adjudicative Guideline G: Alcohol Consumption
One DUI doesn’t automatically cost you a clearance, but it forces you into mitigation. The guidelines let you argue that time has passed, that the incident was isolated, or that you’ve completed treatment and established responsible drinking or abstinence.9Center for Development of Security Excellence. Adjudicative Guideline G: Alcohol Consumption A second incident while an investigation is open, or soon after the first, is much harder to mitigate.
Getting a Lawyer Who Handles Federal Cases
You need a defense attorney who practices in federal court, specifically the U.S. District Court that covers the installation. A lawyer whose DUI practice is entirely in state court may know the law your case borrows but miss the federal procedure that governs how it unfolds.
If you can’t afford private counsel, federal law provides court-appointed representation through the Criminal Justice Act. The Sixth Amendment guarantees counsel in criminal prosecutions carrying potential jail time, and a DUI qualifies.10United States Courts. Defender Services Request appointed counsel at your initial appearance before the Magistrate Judge. Private attorneys for federal DUI cases typically charge flat fees from roughly $2,000 to $10,000 depending on complexity and whether the case goes to trial, with wide regional variation.
Try to get advice before the arraignment. The combination of federal court procedure, base administrative action, home-state license consequences, and any clearance exposure means several things are moving at once, and early choices, including whether to contest the chemical test refusal or negotiate a plea, shape all of them.