Cal. Veh. Code § 12819

Unless the person issued the notice of reexamination requests the reexamination pursuant to Section 12818 within five working days after the department receives the notice of reexamination transmitted pursuant to Section 21062, the department shall peremptorily suspend the driving privilege of the person until the person has completed the reexamination and the department has taken the action prescribed in subdivision (b) of Section 12818.