I’ll have to get back to this; it could take some time because I don’t know the entire history, but remember, our (rocketry’s) inclusion into NFPA probably started when all we had were black powder commercial model rocket motors that the government was trying to regulate. But the rules that govern commercial fireworks don’t apply to us. Only our codes apply to us unless something is explicitly referenced in our codes. I simply went looking to see if the concept of “inhibited” came from there. It doesn’t. It seems to come straight out of NASA and Air Force range safety documents.