Driver's license
The minimum driving age varies between 16 and 18 years of age in different States and Territories. After the minimum age, a graduated licensing scheme operates, with state variations.
South Dakota v. Dole
In 1984, the United States Congress passed the National Minimum Drinking Age Act, which withheld 10% of federal highway funding from states that did not maintain a minimum legal drinking age of 21. South Dakota, which allowed 19-year-olds to purchase (raised from 18 years old as result of NMDAA) beer containing up to 3.2% alcohol, challenged the law, naming Secretary of Transportation Elizabeth Dole as the defendant.