“Producer districts” shall consist of the following:
(a) District 1 consists of Lake, Solano, Mendocino, Sonoma, Marin, and Napa Counties.
(b) District 2 consists of the City and County of San Francisco, and Santa Barbara, San Luis Obispo, Ventura, Monterey, San Benito, Santa Clara, Santa Cruz, Alameda, San Mateo, and Contra Costa Counties.
(c) District 3 consists of Butte, Colusa, Glenn, Sacramento, Shasta, Tehama, Yolo, Yuba, Trinity, Siskiyou, Modoc, Lassen, Plumas, Sierra, Sutter, Humboldt, and Del Norte Counties, and that portion of San Joaquin County north of State Highway 4.
(d) District 4 consists of Merced, Stanislaus, Mariposa, Calaveras, Amador, El Dorado, Placer, Nevada, and Tuolumne Counties, and that portion of San Joaquin County south of State Highway 4.
(e) District 5 consists of Fresno, Alpine, Mono, Inyo, and Madera Counties, and that portion of Kings and Tulare Counties north of Nevada Avenue (Avenue 192).
(f) District 6 consists of Kern County and that portion of Kings and Tulare Counties south of Nevada Avenue (Avenue 192).
(g) District 7 consists of Los Angeles, Orange, Riverside, San Bernardino, Imperial, and San Diego Counties.