If you are convicted of DUI for the _______ time, the court will require you to install an ignition interlock device (IID) on every motor vehicle you operate for up to ten years.

For a third or subsequent DUI conviction, the court will require you to install an ignition interlock device (IID) on every motor vehicle you operate for up to ten years. The IID will monitor your blood alcohol concentration (BAC) and prevent your vehicle from starting if your BAC exceeds a preset limit. [DUI Penalties; Driving Under the Influence of Drugs or Alcohol (The "DUI" Law); B-7. Alcohol, Other Drugs and Driving; Tennessee Comprehensive Driver License Manual]