Date joined the NIC?
 

I'm currently working on adding the dates that each fraternity joined the NIC at https://en.wikipedia.org/wiki/North-...ity_Conference

I still am trying to find information for the following Fraternities:
Kappa Alpha Psi, Kappa Delta Phi, Lambda Sigma Upsilon, Nu Alpha Kappa, Omega Delta Phi, Phi Iota Alpha, Phi Lambda Chi, Phi Sigma Phi, Psi Upsilon, Sigma Tau Gamma, and Tau Phi Sigma.