Any resident of California of the age of fourteen years or upwards of approved moral character shall have the right to enter himself in the University as a student at large and receive tuition in any branch of branches of instruction ... For the time being, an admission fee and rates of tuition such as the Board of Regents shall deem expedient may be required of each pupil; and as soon as the income of the University shall permit, admission and tuition shall be free to all residents of the state.
The Organic Act of the University of California (1868), Sec. 31, 14
Did you get that? Free.