A river's license, driver's licence, driver license, driver licence, or driving licence is an official document which states that a person may operate a motorized vehicle, such as a motorcycle, car, truck, or a bus. In some jurisdictions, driver's licenses are issued after the recipient has passed a driving test, while in others, a person acquires a license before beginning to drive. (This is largely a matter of nomenclature—generally an official document by some name is required to undertake practical driving in either case.) Different categories of license may exist for different types of motor vehicles. The difficulty of the driving test may vary considerably between regions, as do prerequisites such as age restrictions and the required level of tuition.