Tom, your post raised a question.. 
I know that once you're a member of an NPC sorority or an NPHC org, you 
cannot join another one, under any circumstances.
I believe that LXA & Sigma Chi are both members of NIC (correct me if I'm wrong!), so I wondered 
if there were any rules like this among NIC fraternities?  It just seems that there would be.
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SilverTurtle@greekchat.com
Phi Beta Fraternity
Phi chapter