Yes, you can keep your ID card. If you are IRR and in the NARS, which stands for non-affiliated Reserve Service, you have a 2 year period in which to find a "IRR" job. If you don't my understanding is is that they will discharge you. I had more than 8 years to go and picking up a few hot standby's paid way more than the reserves. It was a hard choice but I really enjoy my down time and not commuting to the reserve squadron.