If you get a DUI in California, your license will automatically be suspended.  If you get an attorney, your attorney can file a set-aside that postpones your suspension until your court date.  If you’re in the middle of a 90-day hard suspension, you must not drive, even with an Ignition Interlock Device (IID).  To be eligible for an IID, you’ll need to complete your 90-day hard license suspension, pay all your fees, enroll in a DUI program, and have proof of SR-22 insurance.  After you’ve completed these things, you can find out if you’re eligible for an IID through the Mandatory Actions Unit (MAU), a division of the Department of Motor Vehicles (DMV).
In Riverside County, after you get a minute order from the court, you will have five days to contact Riverside University Health System Drinking Driver Program.
ONLY 4 COUNTIES in California order that an IID is mandatory—Sacramento, Los Angeles, Alameda, and Tulare.  In every other county, an IID requirement is at the judge’s discretion.