Just to add to what NeonPi wrote... AOIIs policy (paraphrasing) is that if a sister transfers and is in good standing then she may affiliate if she wants to, the chapter does not vote on her. Once she is initiated it is for life, and we have to beleive that if any of our chapters thought enough of her to initiate her then that should be good enough.
I have seen other sororities that do it different. My sister has a friend that transferred from FSU to UF. When she tried to affiliate they let her play a big part in the chapter and when they were supposed to vote on her they came up with some excuse as to why the couldn't, then went on to pass a bylaw that until an affiliate member was voted in they could not attend chapter (how could they really get to know an affiliate??), and once they were they could not hold office. Sounds to me like they are taking away her rights and priveliges as a fully initiated member of that org.
