Child Restraint systems other than harnesses, restraints designed for use by children with physical disabilities, school bus child restraint systems, and booster seats NHTSA has reviewed the regulatory Liedertext sections with inconsistent conversions from 40 pounds to kilograms. NHTSA agrees that having a single conversion throughout the three standards is https://www.northwestu.edu/?URL=https://www.ledteks.com/seatbelt-and-safety-belt-webbing