This situation sucks for rocket enthusiasts.. usps, fedex, ups won't ship motors without a massive surcharge, and authentication of the entire supply chain for hobby items of this nature will require massive price increases to bear the costs.
Any distributor of these products will suddenly be placed on the shippers list of 'distributors of hazmat' and their parcels, even though they do not contain hazmat will be individualy opened and inspected prior to their going out into the shippers systems. Results.. if you order a gas engine from a hobby distributor that ALSO carried at one time model rocketry items, you can expect to wait 6 weekks while the package clears security.
Further, distributors and manufacturers will be forced to certify, fingerprint and background check their entire staffs.. model rocket companys will go belly up overnight after this is enacted, killing the sport of model rocketry.
And that sucks.
Next they will come after my giant scale r/c customers.. anything that can payload more than a pound in flight will be proscibed soon..
damn; but this sucks big time.