Missouri’s current helmet law, codified in RSMo §302.026 and effective since August 28, 2020, requires helmets only for riders under 26 years old and riders 26 or older who hold only an instruction permit, while riders 26 and older with a full motorcycle license and health insurance may ride without a helmet. Illinois does not require helmets for adult riders. Insurance requirements also vary between states. Missouri mandates minimum liability coverage of $25,000 per person, $50,000 per accident for bodily injury, and $25,000 for property damage under RSMo §303.190. Critically, Missouri requires uninsured motorist coverage at the same minimums, and unlike many states, this coverage cannot be waived under RSMo §379.203. Illinois requires similar minimums of $25,000/$50,000/$20,000.