Students and student organizations shall be free to examine and discuss all questions of interest to them and to express opinion publicly and privately. They shall be free to support causes by all orderly means, which do not disrupt or substantially interfere with the regular and essential operations and activities of the university, since such disruption or substantial interference violates the responsible exercise of free inquiry and expression. Students and organizations shall make it clear to the academic and larger communities that in their public expression they speak only for themselves.

USC Student Handbook: Appendix IV