Yes. Failure to register by the specified dates means that you will be subject to the fees established for late registrations.
You can then, during the changes period, cancel your registration for the curricular units in which you were successful. If you complete the course during the special period, you must then request the cancellation of your registration for the respective academic year via Fenix by October 30 of that calendar year. This procedure is Mandatory. If you fail to do so, the fees will be charged to your student account and the current fees regulations will apply.