There are no laws that require someone buying a car to have a driver's license, as of 2015. However, in general, most dealers require customers to have licenses for security purposes. Banks are more likely to lend money for a vehicle to individuals without licenses.
Some financiers may make exceptions to their rule about not lending money without a driver's license if individuals can provide an alternate form of identification and have a good reason for being without a license. For example, an individual helping a child or spouse finance a vehicle may not need a license as long as they do not plan to drive the vehicle.