Final answer:
Drivers under age 21 with an examination permit or probationary license must display proof of insurance while operating a motor vehicle.
Step-by-step explanation:
Drivers under age 21 who possess an examination permit or probationary license shall not operate a motor vehicle without displaying proof of insurance. While items such as a valid driver's license and a registration sticker are also essential to operate a vehicle, the specific requirement for new drivers, particularly those under 21, is to ensure they have insurance coverage when driving. This requirement is in place to provide financial protection in the event of an accident and is a legal requirement in many jurisdictions for all drivers, regardless of age or permit type.