The issue is more what will happen with e-certs. When I made Prestige one year I ended up with a whole bunch of SWUs, then I went to Elite in the same year and got additional SSWUS and NAUs - the previous SWUs were not invalidated. Now with e-certs if someone changes status from P to E during the year they may (or may not?) adjust the e-certs to reflect the new status, instead of having the previous additive rule.