DUI defense guide

Ignition Interlock Permit DUI License Guide

Ignition-interlock driving permit is usually controlled by a motor-vehicle agency notice or order. Start with the exact document rather than a nationwide deadline or penalty chart.

Last reviewed: August 11, 2026

Ignition-interlock driving permit

Ignition-interlock driving permit is usually controlled by a motor-vehicle agency notice or order. Start with the exact document rather than a nationwide deadline or penalty chart.

Documents to locate

Interlock order
Approved provider/install proof
Permit application
Insurance proof
Route/time restrictions if any

Questions to verify

Is the permit mandatory or optional?
What vehicles must be equipped?
What agency confirms eligibility?

Keep court and license files separate

The driver-license process can be separate from the criminal prosecution. Keep agency notices, hearing records, and reinstatement proof in a distinct file unless local counsel tells you to combine them.

Reference Sources

Use public safety and legal-information resources to understand general concepts. A licensed defense attorney must confirm how state law applies to a specific case.