Code:
if((Timer::GetTimeSeconds() - account_creation) < aa2->account_time_required)
Assuming GetTimeSeconds finds current epoch time, subtracting the account_creation (account created in epoch time, again assumed) is less than the account_time_required (how old an account must be to use it). Lots of assumptions, but, not looking at the rest of the source, or having never dug into aa.cpp before. <shrug>