This is a hypothetical question. It didn't happen but it can happen because you did not get an Appointment or because you did not get a nomination, despite being competitive otherwise. Sometimes you don't get nominated to your first choice but get nominated to your 2nd or 3rd choice SA. Not that one SA is superior to another, but simply it is not the service or SA of your first choice, and you realize this as you get to know each programs better through visits and interaction. But you got nominated to your latter choice which could have been your first choice in the beginning. This happens, you begin leaning toward one SA but to that SA you did not get a nomination. So if you enroll as a Cadet at your second choice SA, can you reapply to the SA you did not get appointment while a cadet at an SA? Will your current SA allow that to happen? Will your congressman and senators nominate current cadets already attending one SA. Another scenario. If you are attending USCGA, the only SA that does not select with Nomination, if you enroll there and want to enroll in another SA that requires nomination, will the CGA allow you to reapply to the SA you wish to enroll? Similarly, will your Rep and Senators consider you for nomination if you are already attending CGA?