Can a DUI from 30 years ago be counted as a prior DUI if you receive a DUI again?

It depends on the state you are in. Many states have stipulations for when a DUI will turn into a felony that multiple duis must happen within a certain amount of time-usually within 5-7 years. The law article below explains the affect that previous duis have on current ones. There are states that do not have these stipulations, however, and a DUI at any time can be used against you.