I'm way late to this discussion and not even "really" Kenpo anymore, but the rank thing is waaaay over rated.
Interestingly, back in those halcyon old days, late 60 and early 70s, after the split between the Tracy's and SGM Parker all fell out, there was lots of people in lots of places who found themselves without places to go. In those days there wasn't the communication available today, and there was still lots of shake ups and fall outs from various people who didn't have a way to promote due to allegiances and/or distances.
I think a lot of people went where they could to find rank. For example, my instructor, Dick Ranney, was an involuntary part of a "seperate" civil war that occurred in San Antonio that I am not privy to all the details of, to this day. But, unless you were privy to certain accesses, there was no promotion beyond third. Dick Ranney, who has since quit teaching and walked away from Kenpo, eventually ended up taking his climb to 5th degree under Don Nahoolewa, in Kajukembo ... Which was, as I understand it, a seperatist movement, at the time from Kajukenbo, and yet somehow, ended up being ranked up under Adriano Emperado. Phew... Hope you can follow that, I don't know if I can redescribe it.
Interestingly, the same kind of crap continues to this day, over 30 years later... Nothing has changed much. And so, I have to conclude that rank is nothing more than what you want it to be. You can make an association, write bylaws that allow for automatic promotion, word it however you want, and Shazaam! It is valid.
Or, it can happen as it happened to me... Al Tracy told me that as long as I was loyal, my promotions were set up to continue to go. I was told, off the record as it were, that Al was going to have another gathering of eagles at some future date, and that he was planning to have me in, promoted to eighth dan and considered for his Kenpo Hall of Fame. Then, on the whim of several politically oriented people. Bang! All gone.
I was contacted by several people who indicated that were I to start an association, that they would collectively promote me to 10th degree as the head... I passed on that, and so it goes.
So, rank really doesn't matter much in the end. You can make it belts with stripes, sashes with sew on stars (some of the Chinese), educational types of ranking like Doc Chapél does (which in the West really makes more sense), or you can simply give out certificates of proficiency. In the end... It's only what you make it... Or, in the end ... Nothing at all.