California Code, Education Code - EDC § 1005

(a) Notwithstanding subdivision (a) of Section 1000, the term of office of any member of a county board of education who has been elected and whose term of office has not expired shall not be affected by any change in the boundaries of the area from which the member was elected and that member shall continue to represent the constituents residing in the area boundaries from which the member was elected for the duration of that term of office. This section does not prevent a board from assigning a trustee or county office of education official to provide constituent services to residents of an area that is temporarily not represented by a trustee due to redistricting.

(b) At the first election for a member of the county board of education following adoption of the boundaries of trustee areas, excluding a special election to fill a vacancy or a recall election, a member shall be elected for each area under the new trustee area plan that has the same district number as a trustee area whose incumbent's term is due to expire.

(c) For a county board of education employing both a primary and a general election, a change in the boundaries of a trustee area shall not be made between the direct primary election and the general election.