“Districts” shall consist of the following:
(a)
District 1 consists of Del Norte, Siskiyou, Modoc, Humboldt, Trinity, Shasta, Lassen, Tehama, Mendocino, Glenn, Butte, and Plumas Counties.
(b)
District 2 consists of Lake, Colusa, Sutter, Yolo, Napa, Sonoma, Marin, and Solano Counties.
(c)
District 3 consists of Sierra, Yuba, Nevada, Placer, El Dorado, Alpine, Amador, and Sacramento Counties.
(d)
District 4 consists of Contra Costa, Alameda, Santa Clara, Santa Cruz, San Benito, San Francisco, San Mateo, and Monterey Counties.
(e)
District 5 consists of San Joaquin, Calaveras, Tuolumne, Mono, Mariposa, Stanislaus, and Merced Counties.
(f)
District 6 consists of Madera, Fresno, Kings, Tulare, Inyo, and Kern Counties.
(g)
District 7 consists of San Luis Obispo, Santa Barbara, and Ventura Counties.
(h)
District 8 consists of San Bernardino, Riverside, Orange, Los Angeles, San Diego, and Imperial Counties.
The boundaries of any district may be changed by a two-thirds vote of the commission, which is concurred in by the secretary, when necessary to maintain similar total production among the districts, and to insure proper representation by producers. These boundaries need not coincide with county lines.