Proposal to clarify UN R129. 1. Requirements for car manufacturers (Regulation No. 16, Annex 17, Appendix 1, which allows a certain zone) are NOT compatible with requirements for Child Restraint System (CRS) manufacturers (Regulation No. 129, paragraph 6.1.3.4., asks for a different zone). The adult belt is supposed to run over the angle between adult thighs (that are more “fat” and the adult pelvis (that has a bigger depth). Therefore the required zone for the Child Restraint Systems has been adapted such that the routing of the adult belt over the child restraint has to closer to the intended use and design of the adult belt.