Establishes provisions relating to child safety on motorcycles and motortricycles

HB 1831 creates new safety rules for children under 10 riding as passengers on motorcycles or motortricycles in Missouri. It requires motorcycles to have a proper passenger seat and mandates that children must be able to place both feet on foot pegs to ride as a passenger (with medical exemptions allowed). The bill also requires all under-10 passengers to wear protective headgear meeting state standards. These provisions, nicknamed "Calvin's Law," take effect January 1, 2027.