Final answer:
The time a foreign national can drive with a valid foreign license varies by location, usually ranging from a few months to about a year. The precise duration should be confirmed with local regulations, and if staying longer, a local license may be required.
Step-by-step explanation:
The specific duration a foreign national can drive with a valid license from another country varies by jurisdiction. Generally, many places allow for a temporary period, which could be between a few months to a year, but it is vital for the motorist to verify the regulations of the particular state or country they are driving in. Typically, if the person plans to become a resident or stay for an extended period, they would need to obtain a local driving license within the specified timeframe allowed by the local authorities. It is also important for the motorist to ensure that their license is in a language that is understood by local law enforcement, or they may need an International Driving Permit (IDP).