An individual with a CDL who is convicted of a first offense DUI will have that license suspended for one year. It does not matter whether the person was driving a commercial vehicle at the time of the DUI, only that the person had a valid CDL at the time of the offense and conviction. Even if the person enters the ARD program for a first offense DUI, that person will not be able to shorten the period of suspension for his CDL.
A person convicted of two or more DUIs shall have their CDL disqualified for life. For conviction purposes, the entrance into the ARD program constitutes a conviction for this purpose. Therefore, if a person gets his first DUI and enters and successfully completes the ARD program and then, sometime later, gets another DUI conviction, that person's CDL would be disqualified for life.