I'm in IFS right now and when I classed up a month ago you could easily get classed up 2-3 weeks after reporting if you managed to get all your stuff completed that you have to do for check in. I waited 4 weeks since the day I had my NAMI it took forever and I didn't get my up chit in in time. I don't know, however, how it will work for you with the shut down for Christmas happening before you get here.