Which of the following statements is true about Texas laws on motorcyclists wearing helmets?

The statement regarding motorcyclists 21 years of age or older being exempt from wearing helmets if they have proof of a medical insurance policy is true under Texas law. This provision reflects the state's approach to personal freedom and responsibility, allowing adult riders the choice to forego a helmet, provided they meet certain conditions, specifically having an appropriate insurance policy that can cover potential medical expenses in case of an accident.

The exemption emphasizes the importance placed on informed personal choice among adults, while still recognizing the risks associated with riding without a helmet. Riders under the age of 21 do not have this option and are mandated to wear helmets at all times for safety. Other options either misrepresent the requirements or do not align with the current legislation regarding helmet use for motorcyclists in Texas.