British GCE AS-levels on University of California Application

On the University of California website, it says that applicants in the british system of education must have taken at least 5 IGCSE’s AND at least 3 GCE A-level examinations. I am applying for the fall 2016 term so I am not planning on doing a thirteenth year to do the A-level examinations. Is there a way to compensate for this requirement using 4 GCE AS-levels, which I am currently taking?