Their are no fair minded people in the EPA who are addressing this. The only intent is to eliminate any and all forms of racing via any means. It is and will be an attack on several fronts. They will eliminate the after market industry. Period. (SEMA's sole reason for existing and a huge cash cow) Any item that they can not prove as being "intended for" and that modify a vehicle from it's stock form will be so tightly controlled, restricted and expensive at every level, that it won't be worth it.
We have already seen changes in the ways various branches of our Government have started addressing and enforcing the laws they cover. What's to stop the EPA from showing up at an event in a law enforcement capacity. You are held until your car has passed their inspection and if it fails, it is confiscated (sent to the crusher) and the owner arrested/cited. We have seen "street racers" in CA have this happen (for violating the law). Even if they don't "catch you", they will "starve you". With no replacement parts, sooner or later it's game over.
Think they will allow non modified cars to be raced? Maybe for a few, but at some point the use of any and all cars will simply be deemed as "for transportation only". If it ain't taking you to and from work, you are "unnecessarily polluting or wasting" or a resource.
It's important to be leery of labels or of something like this being defined. Even more so when you consider "who" is doing it or what that "interpretation" is.
This isn't good on any level and should be fought on every level. 2016 is going to be a sh1t show, especially in it's final days.
Hey...Enjoy the weekend!