where do you get the list of what vehicles will be exempt or not? im looking at buying a 2008 2009 f350. i would like to find out if that would be excempt.

also, dont you mean vehicles 14000 GVWR or "MORE".

On-Road Heavy-Duty Diesel Vehicles (In-Use) Regulation

The regulation applies to nearly all privately and federally owned diesel fueled trucks and buses and to privately and publicly owned school buses with a gross vehicle weight rating (GVWR) greater than 14,000 pounds.