I consider new PhD students most years. All PhD admissions in
the School of Computer Science at Carnegie Mellon are done through a
centralized admissions committee. Matching to specific labs and advisors
is done after you arrive here to begin your studies. It is helpful of
course to mention your interest in working in the Auton Lab in your
research statement. You can find the application and other advice at
www.cs.cmu.edu/prospectivestudents/doctoral/index.html