Final Answer:
A motorist who legally changes his/her name must report the change to the MVC within two weeks.
Step-by-step explanation:
When a motorist undergoes a legal name change, it is a requirement to promptly notify the Motor Vehicle Commission (MVC) of this change. In this context, the correct time frame for reporting the name change is within two weeks. This prompt reporting ensures that the MVC has updated and accurate information about the motorist's identity, which is essential for maintaining proper records and documentation related to driving licenses and vehicle registration.
To summarize, the final answer is that a motorist must report a legal name change to the MVC within two weeks.