California Code, Welfare and Institutions Code - WIC § 107

(a) Except as provided in subdivision (b), upon presentation of the order of his or her appointment by the CASA, and upon specific court order and consistent with the rules of evidence, any agency, hospital, school, organization, division or department of the state, physician and surgeon, nurse, other health care provider, psychologist, psychiatrist, police department, or mental health clinic shall permit the CASA to inspect and copy any records relating to the child involved in the case of appointment without the consent of the child or parents.

(b) Subdivision (a) does not apply to the records of or pertaining to a nonminor dependent. The CASA may have access to those records only with the explicit written and informed consent of the nonminor dependent.