California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 77225

(a) The commission shall be composed of five districts. The boundaries of each district shall be established by a two-thirds vote of the full commission, that is concurred in by the secretary. District boundaries shall be established to reflect similar total production among the districts in order to ensure proper representation by producers. These boundaries need not coincide with county lines.

(b) The boundaries of any district may be changed by a two-thirds vote of the full commission, that is concurred in by the secretary, when necessary to maintain similar total production among the districts and to ensure proper representation by producers.