As soon as you qualify for SE, and AC does its "sweep" (which happens several times through this period), the AE website will immediately be updated to show SE (that will be your first indication). You will the receive the email to choose your benefits and the package will come out at some point after that. The big item that everyone usually wants in their hot little hands is certs but not this year and right now we do not know exactly how the E-Ugrades will work.

Any reservations you make once the SE is officially recognized will show that status, although conversely, any reservations you make before that will stay as E unless you update them.