Cal. Rev. & Tax. Code § 202.6

Personal property used exclusively in the performance of activities authorized by Article 2 (commencing with Section 48930) of Chapter 6 of Part 27 of Division 4 of, or Article 4 (commencing with Section 76060) of Chapter 1 of Part 47 of Division 7 of the Education Code by a student body organization acting pursuant to those provisions, is deemed property used exclusively for public schools and shall be exempt from taxation.