Cal. Elec. Code § 7466

In the event of the appointment or election to a district committee of an ineligible person, or whenever any member of the committee dies, resigns or becomes incapacitated to act, is removed from office, or removes from the jurisdiction of the district committee, or ceases to be a member of this party, a vacancy exists which shall be filled by appointment by the district committee in which the ineligibility or vacancy occurs.