Anyone who enters the program must complete the program within 7 years after entering. An official leave of absence does not extend this time limit. When a student exceeds the time limit, he or she is no longer in the program and will not be permitted to register.
The Executive Committee may consider requests for extensions from students who have exceeded the time limit. Its policy is to grant extensions only for a few months (one semester at the most) and only if the request includes a date for the final defense of the dissertation within the period of the extension.