US Clean Air Act is Amended to Ban the Sale of Leaded Fuel for Use in On-Road Vehicles

Effective January 1, 1996, the Clean Air Act banned the sale of the small amount of leaded fuel that was still available in some parts of the country for use in on-road vehicles. EPA said fuel containing lead may continue to be sold for off-road uses, including aircraft, racing cars, farm equipment, and marine engines.

http://www.epa.gov/history/topics/lead/02.htm