“Districts” shall consist of the following: (

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

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

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

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

f) District consists of Merced and Madera Counties. (

g) District consists of Fresno County. (

h) District consists of Kings and Tulare Counties. (

i) District consists of Kern County. (

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

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

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

m) District 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.