Education Code § 21118

No wish, direction, act, or condition expressed, made, or given by any grantor, under this article, as to religious instruction to be given in any school, college, seminary, mechanical institute, museum, or gallery of art, or in respect to the exercise of religious belief, on the part of any pupil of the school or institution of learning, shall be binding upon the state. The state shall not enforce, or permit to be enforced or carried out, any such wish, direction, act, or condition.