California Code, Education Code - EDC § 49068.6

(a) Any law enforcement agency responsible for the investigation of a missing child shall inform the school district, other local educational agency, or private school, in which the child is enrolled, that the child is missing.  The notice shall be in writing, shall include a photograph of the child if a photograph is available, and shall be given within 10 days of the child's disappearance.

(b) Every school notified pursuant to this section shall place a notice that the child has been reported missing on the front of each missing child's school record.  For public schools this shall be in addition to the posting requirements set forth in Section 38139.

(c) Local law enforcement agencies may establish a process for informing local schools about abducted children pursuant to this section.

(d) If a school receives a record inquiry or request from any person or entity for a missing child about whom the school has been notified pursuant to this section, the school shall immediately notify the law enforcement authorities who informed the school of the missing child's status.