Modifies provisions relating to child passenger restraint systems

HB 2170 updates Missouri's child passenger safety requirements, requiring drivers to secure children under 16 in appropriate restraints based on age, weight, and height. Specifically, children under 3 must use rear-facing seats (with limited manufacturer exceptions), those under 4 must use a restraint regardless of weight, children under 8 and under 40 pounds must use a restraint, and children aged 4-8 who weigh 40+ pounds but are under 4'9" need a booster seat. Violations for the first four categories are minor infractions punishable by up to $50 fines, but drivers can avoid penalties by purchasing a compliant restraint before court. The law excludes school buses (for students 4+ on buses with 11+ seats) and public carriers, and includes a public education program to support compliance.