Under the new system, how do you exclude yourself from CPU?

On the PMUA system you could do it online before the UDU window. After the UDU window, you would have to call reservations.

Now that we're on the new system, how does it work now?

The PMUA system also showed online (under MyItineraries) that you had successfully excluded yourself from UDU. I understand that under the new system, you can't verify online that you were successfully excluded.