I think every sorority has a clause such as this somewhere.... I don't have an manuals around. I'm positive KD has one somewhere.
I don't think any sorority CAN discriminate b/c of race, creed, etc. and still be a part of NPC.
I don't know what the culture of the school is and how many minorities go through rush.
If she doesn't rush, she'll never know if she could've or not. There's a great chance she could get in somewhere. Sometimes being a minority might even help on some levels- everyone's always looking for diversity. But if she does rush, and does get cut, make sure she knows that it was not because of her race. As a sorority member yourself you know how many facets of a potential new member. I don't want her to have a bad experience and think that it was because of her race. We'll see if anyone else can answer better, i'm having trouble writing this morning. Must be a case of the Saturdays