That is the EPA's interpretation ..
If that is the case, then what is the need for "clarification" if not to screw people over?
If that's been the case all along then why change it?
If they do want to change something, how do we preserve grassroots motorsports? Forget NASCAR and Indy, they have black and white exemptions. There is not one Superbike in WERA, CCS, or MotoAmerica that was not built starting with a street bike. (it's actually required by the rules) There is not one rally car anywhere that was not built starting with a street car. There is not one circle-track stock car (grassroots, not NASCAR) that was not built starting with a street car.