Final answer:
A permit holder must be supervised by an adult at least 21 years old with a valid driver's license and a minimum of 3 years of driving experience.
Step-by-step explanation:
The question pertains to the requirements for a permit holder to be legally accompanied by a supervising driver. A permit holder must be accompanied in the front seat by an adult supervising driver who is at least 21 years of age and who possesses a valid driver's license and has a minimum of 3 years driving experience. This ensures that a new driver is guided by someone with sufficient maturity and experience behind the wheel.