California Code, Labor Code - LAB § 3074.7

Notwithstanding any other provision of law, the governing board of a school district which offers classroom instruction in postgraduate and upgrading courses pursuant to subdivision (d) of Section 3093 of this code may impose a fee upon individuals receiving instruction in such postgraduate and upgrading courses. Such fee shall be not more than the amount necessary, as determined by the governing board, to cover the total cost of all such classroom instruction given the individuals.