Cal. Penal Code § 2045.1

The prison authorized to be established by Section 2045 shall be a medium security type institution. Its primary purpose shall be to provide custody, care, industrial, vocational, and other training to persons confined therein. However, the Director of Corrections may designate a portion or all of the prison to serve the same purposes and to have the same security standards as the institution provided for by Article 4 (commencing at Section 2035) of Chapter 1 of Title 1 of Part 3.