California Code, Code of Civil Procedure - CCP § 205

(a) If a jury commissioner requires a person to complete a questionnaire, the questionnaire shall ask only questions related to juror identification, qualification, and ability to serve as a prospective juror.

(b) Except as ordered by the court, the questionnaire referred to in subdivision (a) shall be used solely for qualifying prospective jurors, and for management of the jury system, and not for assisting in the courtroom voir dire process of selecting trial jurors for specific cases.

(c) The court may require a prospective juror to complete such additional questionnaires as may be deemed relevant and necessary for assisting in the voir dire process or to ascertain whether a fair cross section of the population is represented as required by law, if such procedures are established by local court rule.

(d) The trial judge may direct a prospective juror to complete additional questionnaires as proposed by counsel in a particular case to assist the voir dire process.