Section 16521 Of Article 2. Contest Procedures At Primary Elections: Contests Other Than Recount From California Elections Code >> Division 16. >> Chapter 6. >> Article 2.

. The clerk of the superior court, after an order setting a contest for trial, shall issue a citation to both parties containing a copy of the order. He or she shall deliver it to the sheriff who shall serve it either upon the parties or leave it at the residences named in the affidavits of registration of the parties.