Depending on the IID, it might even issue an additional warning—such as horn honking—if you don't turn off your vehicle in time.Based on the individual state's laws, a judge will order an ignition interlock device when someone is convicted of drunk driving. For example, your state might require an interlock device if this is your first offense; if it's your second or subsequent offense, you might not be eligible for one.Offenders become eligible once they have satisfied any required suspension period associated with their conviction.If an offender, whose offense date is after January 1, 2008, and on or before September 30, 2014, chooses not to have the BAIID installed at the end of the initial driver’s license (DL) suspension period, the DL will remain suspended for three (3) years beyond the date the initial DL suspension period ends.
“Emma’s Law” expanded the Program’s scope, providing for more drivers to be eligible to participate in the Program. The IIDP staff shall operate the Ignition Interlock Management System (IIMS) to monitor the progress on all IIDP offenders.
(Your “monitoring authority" could be the court, a parole or probation officer, your state's driver license agency, or any combination.) Before starting the vehicle, the driver must blow into the interlock device mouthpiece—if the device registers a breath-alcohol concentration that meets the programmed limit requirements, the vehicle will start.
However, if the breath-alcohol concentration is higher than the limit, the vehicle won't start.
Depending on the model of your ignition interlock device, you also might have to look into a camera; this prevents you from allowing other people to blow into the IID.
Sometimes, after the engine is started and the person is driving, the device will request another breath sample; basically, this is another way to make sure someone else didn't provide the initial breath sample.