Cal. Gov't Code § 946.6

(a) If an application for leave to present a claim is denied or deemed to be denied pursuant to Section 911.6, a petition may be made to the court for an order relieving the petitioner from Section 945.4. The proper court for filing the petition is a superior court that would be a proper court for the trial of an action on the cause of action to which the claim relates. If the petition is filed in a court which is not a proper court for the determination of the matter, the court, on motion of any party, shall transfer the proceeding to a proper court. If an action on the cause of action to which the claim relates would be a limited civil case, a proceeding pursuant to this section is a limited civil case.
(b) The petition shall show each of the following:
1. (1) That application was made to the board under Section 911.4 and was denied or deemed denied.
2. (2) The reason for failure to present the claim within the time limit specified in Section 911.2.
3. (3) The information required by Section 910.
  The petition shall be filed within six months after the application to the board is denied or deemed to be denied pursuant to Section 911.6.
(c) The court shall relieve the petitioner from the requirements of Section 945.4 if the court finds that the application to the board under Section 911.4 was made within a reasonable time not to exceed that specified in subdivision (b) of Section 911.4 and was denied or deemed denied pursuant to Section 911.6 and that one or more of the following is applicable:
1. (1) The failure to present the claim was through mistake, inadvertence, surprise, or excusable neglect unless the public entity establishes that it would be prejudiced in the defense of the claim if the court relieves the petitioner from the requirements of Section 945.4.
2. (2) The person who sustained the alleged injury, damage, or loss was a minor during all of the time specified in Section 911.2 for the presentation of the claim.
3. (3) The person who sustained the alleged injury, damage, or loss was a minor during any of the time specified in Section 911.2 for the presentation of the claim, provided the application is presented within six months of the person turning 18 years of age or a year after the claim accrues, whichever occurs first.
4. (4) The person who sustained the alleged injury, damage, or loss was physically or mentally incapacitated during all of the time specified in Section 911.2 for the presentation of the claim and by reason of that disability failed to present a claim during that time.
5. (5) The person who sustained the alleged injury, damage, or loss was physically or mentally incapacitated during any of the time specified in Section 911.2 for the presentation of the claim and by reason of that disability failed to present a claim during that time, provided the application is presented within six months of the person no longer being physically or mentally incapacitated, or a year after the claim accrues, whichever occurs first.
6. (6) The person who sustained the alleged injury, damage, or loss died before the expiration of the time specified in Section 911.2 for the presentation of the claim.
(d) A copy of the petition and a written notice of the time and place of hearing shall be served before the hearing as prescribed by subdivision (b) of Section 1005 of the Code of Civil Procedure on (1) the clerk or secretary or board of the local public entity, if the respondent is a local public entity, or (2) the Attorney General, if the respondent is the state. If the petition involves a claim arising out of alleged actions or inactions of the Department of Transportation, service of the petition and notice of the hearing shall be made on the Attorney General or the Director of Transportation. Service on the Attorney General may be accomplished at any of the Attorney General’s offices in Los Angeles, Sacramento, San Diego, or San Francisco. Service on the Director of Transportation may be accomplished only at the Department of Transportation’s headquarters office in Sacramento. If the petition involves a claim arising out of alleged actions or inactions of a judicial branch entity, service of the petition and notice of the hearing shall be made in accordance with the following:
1. (1) If the petition involves a claim arising out of alleged actions or inactions of a superior court or a judge, court executive officer, or trial court employee, as defined in Section 811.9, of the court, service shall be made on the court executive officer.
2. (2) If the petition involves a claim arising out of alleged actions or inactions of a court of appeal or a judge thereof, service shall be made on the Clerk/Executive Officer of the Court of Appeal.
3. (3) If the petition involves a claim arising out of alleged actions or inactions of the Supreme Court or a judge thereof, service shall be made on the Clerk/Executive Officer of the Supreme Court.
4. (4) If the petition involves a claim arising out of alleged actions or inactions of the Judicial Council or the Administrative Office of the Courts, service shall be made on the Administrative Director of the Judicial Council.
(e) The court shall make an independent determination upon the petition. The determination shall be made upon the basis of the petition, any affidavits in support of or in opposition to the petition, and any additional evidence received at the hearing on the petition.
(f) If the court makes an order relieving the petitioner from Section 945.4, suit on the cause of action to which the claim relates shall be filed with the court within 30 days thereafter.