Miss. Code § 63-7-64
No person shall operate or ride upon any motorcycle or motor scooter upon the public roads or highways of this state unless such person is wearing on his or her head a crash helmet that complies with minimum guidelines established by the National Highway Traffic Safety Administration pursuant to federal Motor Vehicle Safety Standard No. 218 (49 CFR 571.218). Violation of this section shall be deemed a violation of the traffic regulations and rules of the road and punishable as provided by Section 63-9-11. This section shall not apply to a person operating an autocycle as defined in Section 63-3-103 or persons riding any motorcycle or motor scooter in a parade, at a speed not to exceed thirty (30) miles per hour, if the person is eighteen (18) years of age or older.
Miss. Code § 63-7-64