Section 4571 Of Chapter 3. Unauthorized Communications With Prisons And Prisoners From California Penal Code >> Title 5. >> Part 3. >> Chapter 3.

. Every person who, having been previously convicted of a felony and confined in any State prison in this State, without the consent of the warden or other officer in charge of any State prison or prison road camp, or prison forestry camp, or other prison camp or prison farm or any other place where prisoners of the State prison are located under the custody of prison officials, officers or employees, or any jail or any county road camp in this State, comes upon the grounds of any such institution, or lands belonging or adjacent thereto, is guilty of a felony.