transferring chapters???

I'm really trying to transfer to USC for my sophomore year because it's always been my dream school and I wasn't accepted as a freshman. Currently I'm in a sorority at my school (DG) but if I transfer will I be considered for the USC chapter or am I automatically affiliated or how does it work for transferring chapters? Not that it would play a role in my decision if I'm accepted, I'd go to USC no matter what, just wondering