commercial license classes are standardized by federal regulation at 49 CFR 383. Many states share a common system of license classes, with some exceptions, e.g. A state may also suspend an individual's driving privilege within its borders for traffic violations.

Generally, a minimum age of 16 is required to obtain a driver's or motorcycle license, and 18 for a commercial driver's license which is required for operating large and heavy vehicles (for example, buses and trucks) or any vehicle, regardless of size, with more than 15 passengers (including the driver) or hazardous materials. There are also licenses for motorcycle use. All states of the United States and provinces and territories of Canada recognize each other's licenses for non-resident age requirements.

Drivers are normally required to obtain a license from their state of residence. In the United States, driver's licenses are issued by each individual state, territory, and the District of Columbia rather than by the federal government due to federalism. Sample Californian, Floridian, and District of Columbia driver's licenses

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