A person may not operate or ride upon a motorcycle upon a highway unless he or she properly wears protective headgear of a type that conforms to the federal Motor Vehicle Safety Standards contained in 49 C.F.R. § 571.218, as may be amended. The requirement of this section shall not apply to occupants of fully enclosed autocycles. (Added 1967, No. 264 (Adj. Sess.), § 1; amended 2009, No. 39, § 3; 2013, No. 189 (Adj. Sess.), § 37.)