Pen. Code, § 4325

(a) The board of supervisors of the Counties of Lake, Los Angeles, Madera, Sacramento, San Diego, San Joaquin, San Luis Obispo, Sonoma, Stanislaus, Tulare, Tuolumne, and Ventura may authorize, by ordinance or resolution, the sheriff or county director of corrections to create a Jail Industry Authority within the county jail system.

(b) The purpose of the Jail Industry Authority includes all of the following:

(1) To develop and operate industrial, agricultural, or service enterprises or programs employing prisoners in county correctional facilities under the jurisdiction of the sheriff or county director of corrections.

(2) To create and maintain working conditions within the enterprises or programs as similar as possible to those that prevail in private industry.

(3) To ensure prisoners have the opportunity to work productively and earn funds, if approved by the board of supervisors pursuant to Section 4019.3, and to acquire or improve effective work habits and occupational skills.

(4) To allow inmates who participate in the enterprise or program the opportunity to earn additional time credits allowed under Section 4019.1 or 4019.4, if authorized by the sheriff or county director of corrections.

(5) To operate a work program for inmates in county correctional facilities that will ultimately be self-supporting by generating sufficient funds from the sale of products and services to pay all the expenses of the program and that will provide goods and services that are or will be used by the county correctional facilities, thereby reducing the cost of its operation.