I have been told by the foton factory in China a few months ago that the perkins engine they use is not epa certified, but I suppose this could have changed. Some chinese companies will provide you any kind of document or label you ask for, including logos like NIKE, Rolex, etc... It could be that the engine was close enough to a Perkins that they could use the same engine family code as a certified Perkins engine, it could also be that this is a new development for 2006 which is great news for the Chinese tractor industry as a whole.
I have recently heard that there is a 40HP engine that may have EPA approval now, once that is confirmed, that will be the first engine over 35 HP that has certifiecation that I am aware of and I ask people in China monthly about the progress of these bigger engines.
I have confirmed that the Duetz engine is not yet EPA certified for the big 80 and 100 HP KAMAs and due to the level of interest in the USA, I do not expect any change here.