Cal. Penal Code § 2717.2

The Director of Corrections shall establish joint venture programs within state prison facilities to allow joint venture employers to employ inmates confined in the state prison system for the purpose of producing goods or services. While recognizing the constraints of operating within the prison system, such programs will be patterned after operations outside of prison so as to provide inmates with the skills and work habits necessary to become productive members of society upon their release from state prison.