“Districts” shall consist of the following:

1. (a) District 1 consists of Tulare, Kern, San Bernardino, San Luis Obispo, Santa Barbara, Ventura, Los Angeles, Orange, Riverside, San Diego, and Imperial Counties.
2. (b) District 2 consists of Kings, Fresno, Madera, and Merced Counties.

3. (c) District 3 consists of all counties where pistachios are produced that are not included in Districts 1 and 2.

   The boundaries of any district may be changed by a two-thirds vote of the commission, which is concurred in by the secretary, to ensure proper representation by producers. The boundaries need not coincide with county lines.