Cal. Code Regs. tit. 17 § 2508 : Public Health — State Department of Health Services — Preventive Medical Service — Reportable Diseases and Conditions — Reporting — Reporting by Schools

It shall be the duty of anyone in charge of a public or private school, kindergarten, boarding school, or day nursery to report at once to the local health officer the presence or suspected presence of any of the communicable diseases.