California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 72027

(a) District 1 consists of Siskiyou, Tehama, Lassen, Modoc, and Shasta Counties.

(b) District 2 consists of Butte, Colusa, Glenn, and Lake Counties.

(c) District 3 consists of Napa, Sonoma, Yolo, Amador, El Dorado, Placer, Yuba, Nevada, Sutter, and Sierra Counties and that portion of Sacramento County lying north of Road J-11 and east of the Sacramento River from Walnut Grove to Courtland.

(d) District 4 consists of Solano County and that portion of Sacramento County not included in District 3.

(e) District 5 consists of Alameda, Contra Costa, Stanislaus, and San Joaquin Counties.

(f) District 6 consists of Merced and Madera Counties.

(g) District 7 consists of Fresno County.

(h) District 8 consists of Kings and Tulare Counties.

(i) District 9 consists of Kern County.

(j) District 10 consists of Santa Barbara, San Luis Obispo, Monterey, and San Benito Counties.

(k) District 11 consists of San Bernardino, Riverside, San Diego, Los Angeles and Ventura Counties.

(l) District 12 consists of that part of Imperial County lying north of Keystone Road.

(m) District 13 consists of that part of Imperial County lying south of Keystone Road.

The number of districts and boundaries of any district may be changed by a two-thirds vote of the commission, as long as proper notice is provided to all persons subject to this chapter and the action of the commission is concurred in by the secretary, to ensure proper representation by producers. These boundaries need not coincide with county lines.