Suspensions & Hearings

An IID is a handheld breath-alcohol monitoring device (approximately the size of a cell phone) that is electronically connected to a vehicle's ignition. Before starting your vehicle, the IID requires you to take and pass a breath-alcohol test. The IID also requires you to take breath-alcohol re-tests while you are operating the vehicle.

The IID program requires multiple offenders who have accumulated two or more convictions for OUI (Alcohol or Controlled Substances) to have the IID installed in their vehicle. Further, the RMV will honor court orders requesting that an operator install the IID for the full length of that court order.an IID.

The minimum period for an IID restriction is two years. If the IID is issued on a conditional hardship license, the IID is required for the length of that OUI license suspension or revocation period plus two years after reinstatement of full operating privileges.

The IID license restriction is not automatically removed at the conclusion of the IID license restriction period.

All operators must apply to the RMV's Ignition Interlock Department to have the IID removed from their vehicle and the license restriction lifted. Please refer to the IID Device Removal section for more information.

Operator's responsibilities

Operators are responsible for the installation, maintenance, proper usage and payment of all associated IID fees.

  • Installation – You must contact a vendor/service provider and schedule an IID installation.
  • Maintenance Visits – You must return to the service provider once every 25-30 days from the last service visit for scheduled maintenance and data uploads.
  • Proper Usage – You must follow all of the rules and guidelines you are given for using the IID and must never tamper with or try to circumvent the use of the IID.
  • Payment – You must pay the vendor/service provider all of the required leasing and maintenance fees.

Change of address or vehicle

All operators in the IID program are required to report status changes to the RMV’s Ignition Interlock Department. Updated information shall include but is not limited to the following:

  • Change of address
  • Change of IID vendor/service provider
  • Transfer of an IID to a new vehicle
  • Adding an IID to a second vehicle
  • Notification of a disabled, broken-down, non-operational or totaled vehicle that is IID equipped
  • Filing of additional licensed driver affidavits




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