That's also my mental image, mostly because that's the common reality within the NGAA.It varies so widely--I've commonly seen anything from brown belt to 4th dan as the minimum to teach for a given org., with exceptions at both ends. Remy Presas encouraged even complete newbies to spread Modern Arnis after a single weekend seminar, for which one got a beginner's instructional certificate--he was that anxious to have his art spread outside its homeland. My mental image is that a brown belt is an asst. instructor level and that a first degree black belt should be able to open their own school and grant at least some colored belt ranks, but that's just based on me averaging out what I've seen over the years. In many cases you need to have higher dan rank to have your own school.