California Code, Elections Code - ELEC § 13314

(a)(1) An elector may seek a writ of mandate alleging that an error or omission has occurred, or is about to occur, in the placing of a name on, or in the printing of, a ballot, county voter information guide, state voter information guide, or other official matter, or that any neglect of duty has occurred, or is about to occur.

(2) A peremptory writ of mandate shall issue only upon proof of both of the following:

(3) The action or appeal shall have priority over all other civil matters.

(4) The Secretary of State shall be named as a respondent or a real party in interest in any proceeding under this section concerning a measure or a candidate described in Section 15375, except for a candidate for judge of the superior court.

(1) The Secretary of State is named as a real party in interest or as a respondent.

(2) A candidate for statewide elective office is named as a party.

(3) A statewide measure that is to be placed on the ballot is the subject of the proceeding.