Is there any precedent for this? It is not too uncommon for purple or brown belts to run classes, and I don't think those people are necessarily illegitimate instructors simply by virtue of their rank. At the same time, I am wondering if ever those people are justified in giving out stripes (or a full belt), or is it simply the law of the land that you must wait for the black belt who promoted them to make that decision himself? One may argue that the purple/brown belt who teaches them every day would be more familiar with that student (not just as a BJJ player, but as a person) than the black belt. But, one may also argue that the black belt's superior experience would make his decisions more informed than that of his advanced students. tl;dr: would you personally consider a stripe and/or a blue belt awarded to a white belt by an experienced purple or brown belt instructor to be illegitimate? Discuss.