An Ignition Interlock Device is a system that you install in your automobile's ignition. The device prevents the car from starting until you have blown into a mouth tube. If the machine registers any alcohol on your breath it will prevent your car from starting.
The State of Idaho requires an installation of the device on your vehicle within ten days of reinstating your driver's license after the mandatory driver's license suspension is over. The court may give you a restricted driving permit to drive for work after it suspends your license. You will not have the interlock device on your vehicle during the suspension. You will only be required to have the interlock after the driver's license suspension is over.
The State of Idaho requires you to keep the interlock on your car for 1 year following the driver's license suspension. What this means is, that even if you have been driving on a restricted work permit granted by the Court, it will still be a full year from the day your license is reinstated before you can drive without an interlock device again.
The Court can grant an exception to the interlock requirement. Idaho Code 18-8002(12)