California Code, Vehicle Code - VEH § 16070

(a) Whenever a driver involved in an accident described in Section 16000 fails to provide evidence of financial responsibility, as required by Section 16020, at the time of the accident, the department shall, pursuant to subdivision (b), suspend the privilege of the driver or owner to drive a motor vehicle, including the driving privilege of a nonresident in this state.

(b) Whenever the department receives an accident report pursuant to this article that alleges that any of the drivers involved in the accident was not in compliance with Section 16020 at the time of the accident, the department shall immediately mail to that driver a notice of intent to suspend the driving privilege of that driver.  The department shall suspend the driving privilege 30 days after mailing the notice, unless the driver has, prior to that date, established evidence of financial responsibility at the time of the accident, as specified in Section 16021, with the department.  The suspension notice shall notify the driver of the action taken and the right to a hearing under Section 16075.