The Department of Natural Resources and Environmental Control adopted 7 Del. Admin. Code §60.1140, Delaware's National Low Emission Vehicle Regulation. The regulation adds a state Low Emission Vehicle program, incorporating the requirements from California's program, and mandating that only California-certified vehicles may be legally sold in the state starting in 2013. The Department said that, after extensive research with local car dealers, the highest percentage of non-California Air Resources Board certified cars available on any lot was 10%, while the majority of dealers had zero, one, or two vehicles without the certification. http://regulations.delaware.gov/register/december2010/final/14%20DE%20Reg%20583%2012-01-10.htm#P11_306.