From the US Gov web site:
" President Obama signed into law a program NHTSA is calling the Car Allowance Rebate System (CARS). This is a government program that helps you purchase a new, more fuel efficient vehicle when you trade in a less fuel efficient vehicle. See the Frequently Asked Questions for more details. "
" While the CARS Act makes transactions on and after July 1 potentially eligible for credits under the CARS program, interested dealers and consumers may want to wait until all of the detailed issues that must be addressed in the implementing regulations are resolved and the final rule is issued. Issuance will occur around July 23. "
" What is NHTSA doing to guard against fraud? Click here for more information. See Program Rollout " "
http://www.cars.gov/
http://www.fueleconomy.gov/feg/findacar.htm