[aopirose]

OK. I think I know what's happening. Your university has decided to have the locals obtain national backing. Even though your sorority has two other chapters and could be considered a small national, steps to create a National Board and all that other stuff were never done. Correct? The university mentioned affiliating with Sigma because the chapter on your campus seems most similar to you. (Sigma may or may not be aware of this.) If you don't obtain national stature/affiliation of some sort, your sorority chapter must disband. Has the university set a deadline?