If I remember, when I was called if I didnt want to accept, they was a way to defer. I dont remember how but i think I was able to defer by phone or online. Your allowed 2 or 3 deferments. I was taken off the list to be called and to get back on I had to go to the DCAS office. That was easy. I had to write a 2 sentence letter there to request to be put back on the list. I was called right away. The DCAS office is behind City Hall at the foot of the Brooklyn Bridge