CB testers need not apply!
From the page where you apply for OB:
"Users who have already been accepted as beta testers or who have already registered a beta test registration code on the Square Enix Account Management System do not need to apply for the open beta test. Open beta test registration codes and information on how to register them will be sent shortly. If, however, you possess a registration code but have never registered it on the Square Enix Account Management System, please log in below and apply for the open beta test. "