No person under eighteen (18) years of age shall ride upon or be permitted to operate a motorcycle, motorbike, utility type vehicle or an all-terrain vehicle unless at all times when so operating or riding upon the vehicle he is wearing, as part of his motorcycle, motorbike, UTV or ATV equipment, a protective safety helmet of a type and quality equal to or better than the standards established for helmets by the director, except the provisions of this section shall not apply when such vehicles are operated or ridden on private property, or when used as an implement of husbandry, and shall also not apply to completely enclosed autocycles.