I believe you can start booking when they reopen the window on 11/21. My understanding is that it goes back to 180 days at the point. Also, remember that you can still book CRT, CM and V&A at 180 days. My 180 days is tomorrow (I called this morning thinking it was today! Oops!) and the CM suggested that I call back periodically before 11/21 to see if anything changes. I highly doubt they will move the date up- plus if they do, I'm sure I'll ready about it here!