Section 8004 Of Article 1. General Provisions From California Elections Code >> Division 8. >> Part 1. >> Chapter 1. >> Article 1.

. (a) In the event that no candidate files for a party's nomination for any partisan office that would appear on the ballot in a county or a political subdivision within that county, the elections official shall do both of the following:
  (1) Refrain from printing a partisan ballot for that party in that county or a political subdivision within that county in which there are no candidates for that political party's nomination.
  (2) Send notification to those voters registered as affiliated with that party that there were no qualified candidates for the partisan office for which the voter is eligible to vote, together with a nonpartisan ballot, unless, within 10 days after the final date for filing nomination papers for the office, a petition indicating that a write-in campaign will be conducted is filed with the elections official and signed by 10 percent of the registered voters, or 100 registered voters, whichever is less, affiliated with that party within the county or a political subdivision within that county, whichever is applicable.
  (b) A separate petition shall be filed for each specific office for which a write-in campaign is to be conducted.