First introduced by General Motors in basic form on air-bag-equipped models in the mid-1970s, EDRs were being used by various manufacturers in 64 percent of all new models by the 2005 model year, according to the National Highway Traffic Safety Administration (NHTSA). The Insurance Institute for Highway Safety (IIHS) says more recent data shows all new cars have some form of EDR. However, the specific information gathered varies by auto manufacturer, and some companies make it easier to retrieve data than others.A new NHTSA proposed rule would require these EDRs in all light-passenger vehicles, starting September 1, 2014.  NHTSA estimates that approximately 96 percent of the model year 2013 passenger cars and light-duty vehicles were already equipped with EDR capability.The significance of this measure is in the specifics of what data it requires such devices to collect and its guidelines for how the data should be accessed.