California Code, Code of Civil Procedure - CCP § 397

(a) When the court designated in the complaint is not the proper court.

(b) When there is reason to believe that an impartial trial cannot be had therein.

(c) When the convenience of witnesses and the ends of justice would be promoted by the change.

(d) When from any cause there is no judge of the court qualified to act.

(e) When a proceeding for dissolution of marriage has been filed in the county in which the petitioner has been a resident for three months next preceding the commencement of the proceeding, and the respondent at the time of the commencement of the proceeding is a resident of another county in this state, to the county of the respondent's residence when the ends of justice would be promoted by the change. If a motion to change the place of trial is made pursuant to this paragraph, the court may, prior to the determination of such motion, consider and determine motions for allowance of temporary spousal support, support of children, temporary restraining orders, attorneys' fees, and costs, and make all necessary and proper orders in connection therewith.