Once the PPT numbers are finalized nothing can change them. You could have half your facility retire the day before the panel and you could still be eligible for release as long as you were eligible on the PPT.
On the NCEPT panel I got selected on we were just barely eligible for 1 release for both AOB and projected staffing. A couple days after the numbers were finalized we had someone resign on the spot for personal reasons and my ATM threw a shit fit trying to get our numbers updated. He was a real piece of shit but he failed because the rules are the rules. Definitely one of the positives of NCEPT, you know what to expect. This was all before the Dynamic Decisions era of NCEPT though