"The students who will be speaking at activities will be selected based on neutral criteria to deliver messages of the students' own choices.  The content of each student speaker's message is the private expression of the individual student and does not reflect any position or expression of the school district or the board of trustees, or the district's administration, or employees of the district, or the views of any other graduate.  The contents of these messages were prepared by the student volunteers, and the district refrained from any interaction with student speakers regarding the student speakers' viewpoints on permissible subjects."