Comparisons are made between car-bed and rear-facing infant restraint systems in terms of design concepts, accident experience, use and misuse, and dynamic test criteria. Terminology from various jurisdictions is defined and the different regulation summarized as a starting point for enhancing communication and attempting to harmonize requirements for infant restraint systems. Suggestions are also made for improving the ways in which infant restraints are evaluated. so that these svstems will better meet future needs.