Cal. Gov't Code § 19992.2

(a) Appointing powers shall prepare performance reports and keep them on file as prescribed by department rule.
The rules shall provide that employees be shown the performance report covering their own service and are privileged to discuss it with the appointing power before it is filed. The extent to which such ratings or performance reports shall be open to inspection by the public shall be prescribed by department rule.
(b) If the provisions of this section are in conflict with the provisions of a memorandum of understanding reached pursuant to Section 3517.5, the memorandum of understanding shall be controlling without further legislative action, except that if such provisions of a memorandum of understanding require the expenditure of funds, the provisions shall not become effective unless approved by the Legislature in the annual Budget Act.