Presentation to highlight inconsistencies in the lateral and forward cumulative head and chest acceleration injury criteria (determination of the maximum acceleration with a cumulative duration of at least 3ms).

Review of UN R129 testing with regard to child dummy performance, submarining, pelvic/abdominal measurements, and injury criteria.

Summary of investigations into belt slippage (clavicle and neck) and chest deflection to define areas for improvement of the test procedures under UN R129.

Presentation of proposal for interim solution to allow for booster cushions without a backrest to be kept in UN R44 (but prohibited for children smaller than 125 cm) pending development of provisions for non-integral i-Size booster seats with integrated backrest under UN R129 (Phase2).