although they are not NPC, it appears they are in the same council and most likely had to agree to follow NPC Unanimous agreements and recruitment rules. i have a local at my campus and they are required to follow NPC guidelines. they are given a MOI (green book) and we cover the rules, so they are familar with rules and expectations.
what's more interesting is the website for the one local not mentioned. it's history is a little odd to me. In short....they were an interest group, then affiliated with Kappa Alpha Theta, didn't like all those rules they had to follow from HQ, so dropped affiliation with Theta. Kept their chapter designation and part of Theta as their name....Epsilon Kappa Theta b/c they still wanted to be called Theta's. That is just the weirdest thing to me. sorry to hijak the OP.
http://www.dartmouth.edu/~ekt/