2010 California Rules of Court - Title Four Rules (
http://www.courtinfo.ca.gov/rules/in...nkid=rule4_210 )
Rule 4.210. Traffic court-trial by written declaration
(b) Procedure
(7)Trial de novo
If the defendant files a Request for New Trial (Trial de Novo) (form TR-220) within 20 calendar days after the date of delivery or mailing of the Decision and Notice of Decision (form TR-215), the clerk must set a trial date within 45 calendar days of receipt of the defendant's written request for a new trial. The clerk must deliver or mail to the defendant and to the arresting officer's agency the Order and Notice to Defendant of New Trial (Trial de Novo) (form TR-225). If the defendant's request is not timely received, no new trial may be held and the case must be closed.