local chapter infractions???

[tigerchick]

Okay so I go to a small school with a small panhellenic (only 6 chapters!)
One of these chapters is not an NPC sorority. It is a small local sorority. They are technically a minority group because they only accept girls of a certain minority (they have told us that, we arn't assuming!). They are part of our Panhell council, and I honestly dont think they would survive without us. even though they arnt national. But they keep trying to get around formal recruitment. Like, they emailed us the other day with a list of COB's. Even though we told them several times (sooooo many times) that they can not COB untill after the end of formal rush. Does anyone have any advice for how to deal with this chapter? They have no national to answer to, but we can't just kick them out of our Campus Panhellenic Council because (our advisor says) it would be seen as discrimination.