[PenguinTrax]

First of all, you are assuming that the national groups you mentioned would want to join the NPC. Many groups would not want to participate in the recruitment process used by nationals and many (not all) cultural groups' recruitment and pledging practices are considered hazing by the NPC. A lot of groups don't want to change, even if their inclusion in the NPC would benefit both.

Secondly, a national group has be established in the national form for at least 13 years, must have at least 14 chapters and the youngest chapter has to be at least 2 years old. This means that the sorority would need to put a moratorium on expansion for at least 2 or more years before applying to the NPC. Many groups don't want to do that.


BTW - this topic has been discussed several times before. The search function is a wonderful thing.