Is there a look back period for DUI?
Is, what is it?
First of all a "look-back period" is the time in which the court will look back into your driving record to see if you have any prior DUI's. If you don't then your current DUI is treated as your first offense for sentencing purposes (however, a DUI stays on your driving record forever).
In IL the look-back period is 5 years.