Chapter 347. Equipment of Vehicles. Section 347.485. Protective headgear for use on Type 1 Motorcycles:
"(1)(a) No person who holds an instructional permit under s. 343.07(4) or who is under 18 years of age may operate or ride upon a Type 1 motorcycle on any highway unless the person is wearing protective headgear of a type which meets the standards established for motorcycle operation in 49 CFR 571.218 and the chin strap is properly fastened."
"(am) No person may operate a Type 1 motorcycle when carrying a passenger under 18 years of age unless the passenger is wearing protective headgear."