I was really just pointing out that all helmet sold in Australia for use by motorcyclist on the road, by law must meet AS1698, and therefore have a sticker afixed to it. If a shop is selling helmets that doesn't have the AS1698 sticker, they must point out that they are not for use on the roads and can only be used for competition or display purposes.
As a licensed MA official, I have passed quite a few helmets through machine examination that didn't have an AS1698, but had sticker for other standards as listed in the GCR's. I have also passes one through for a "young gun" at a club event who had all the latest, trickest, expensive riding gear, and had peeled the AS1698 sticker off of his helmet because it "wrecked the graphics". I passed it, on the day becuase I had seen other helmets the same with the AS1698 sticker. He was warned that he would need to get a new helmet before the next event as I would not pass it in the future (it did not have any other certifications labels inside).
In the reliability trials that I compete in, since the events are run in part on public roads, all of the helmets must meet the AS1698 std and have the stickers.
So, Zman, as long as you are only going to use the helmet for competition (or offroad riding) if it meets any of the US standard, i.e. DOT 218/SNELL M95, M2000, M2005, and is marked accordingly, then it is legal for use in a MA sactioned event. I would contact the seller and ask for confirmation that it has the DOT/SNELL sticker/labels.
CJ