California Code, Elections Code - ELEC § 16400

(a) The name of the contestant and that he or she is an elector of the district or county, as the case may be, in which the contested election was held.

(b) The name of the defendant.

(c) The office.

(d) The particular grounds of contest and the section of this code under which the statement is filed.

(e) The date of declaration of the result of the election by the body canvassing the returns thereof.