Proposal to align the provisions on toxicity and flammability of materials used to manufacture Child Restraint Systems (CRS) and to update test provisions of UN Regulation introduced by the Supplement 1 to the 01 series of amendments to UN Regulation No. 129. The proposal also clarifies requirements and improves the text of the 02 series of amendments, including strap positioning provisions and labeling requirements for detachable child seat impact shields.