A DUI can result in a drivers license suspension in one of two ways. First, if the person arrested for DUI is .01 blood alcohol level (BA) or more and is under 21 years of age or on probation for a DUI and served with a pink sheet, or is over 21 and .08 or more BA at the time of driving. Secondly, if there is a conviction for VC 23152(a) DUI or VC 23152(b) driving with .08 or more, a DMV suspension is triggered.
A first offense DUI restricted license is available in Vista cases and throughout California. Los Angeles County requires an IID (Ignition Interlock Device) depending on the resolution. If you have a 1st offense DMV administrative per se suspension for 4 months for being over a .08 and a conviction, you need to wait for 30 days after the per se suspension starts before going to the DMV and converting the 4 month suspension to a 1 month suspension and 5 month restriction. There are different requirements if you were under 21 at the time of the offense.