boatgeek
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Why in the world would a gov agency use a non-gov definition (NFPA is private, not gov) when they have a gov issued definition (FAR 101)? This seems very backwards to me.
22 CFR 121.1 references NFPA quite a lot actually. Did you know you can't export certified motors having more than 5 pounds of propellant? 22CFR 121.1(D) note 1 How does AT and CTI export anything M or larger?
And if your guidance system is not for export, does the state department's munitions export control list (22 CFR 121) even apply?
CFRs incorporate other regulations by reference all the time. They probably didn't use FAR 101 because Class 3 (P motors and above) is unlimited. There isn't a handy distinction in there between the very high end of our hobby (R? S?) and rockets intended to go 300km downrange. If they had used FAR 101, every rocket over O could be considered ITAR, and we wouldn't have threads here about those cool projects.