Driving Under the Influence(DUI) also known as Driving While Intoxicated(DWI) and Operating Under the Influence(OUI) laws in some states, vary depending on your location. Below, you will find legal information on laws broken out by 1st, 2nd and 3rd offense DUIs. You'll also find data on the maximum blood alcohol content (BAC) for drivers as well as the look back period used for what multiple offenses.