Kelli, I thought that the Panhellenic sororities did have everything pretty well uniform across all their chapters. I think if they were to risk deviating from rituals, rules, regulations, etc., they would likely have their charter revoked.

Hhhmmm...I still don't know why the "inc." is there (sorry...I honestly don't)
I'll hunt around on some of the forums that you mentioned and see if I can find it.