I have been looking over the code after the last 2 suggestion and I found this code in exp.cpp.
Code:
if (GetLevel() < 51) {
m_epp.perAA = 0; // turn off aa exp if they drop below 51
} else
SendAlternateAdvancementStats(); //otherwise, send them an AA update
It seems like if I were to comment that part of the code out I might be able to set AA's on below 51? Before I tried it I was hoping for some feedback.