California Code, Government Code - GOV § 71660

(a) Each trial court shall, at reasonable times and intervals, permit an employee, upon that employee's request, to inspect any personnel files that are used, or have been used, to determine that employee's qualifications for employment, promotion, additional compensation, or termination or other disciplinary action.

(b) Each trial court shall keep a copy of each employee's official personnel files at the place where the employee reports to work, or shall make the official personnel files available where the employee reports to work within a reasonable period of time after a request for the official personnel files by the employee.

(c) Records of a trial court employee relating to the investigation of a possible criminal offense, letters of reference, and other matters protected by constitutional, statutory, or common law provisions, shall be excluded from the personnel files for purposes of this section.