The United States will not support the proposed amendment in its current form. The amendment would increase headrest heights for front outboard seating positions from 800 mm to at least 830 mm while allowing a decrease in minimum heights to 720 mm from 750mm. In addition, the amendment would allow decreased rear heights. The US believes the amendment lacks adequate evidence-based justifications for the proposed changes.
6. The expert from the Netherlands introduced ECE/TRANS/WP.29/GRSP/2013/17, aimed at increasing the height of the head restraint at the front driver seating position, to cover taller occupants, and decreasing the lowest height of head restraints at the front passenger seating positions for reason of visibility. The expert from the United States of America argued (GRSP-54-23) a lack of rational for both proposed height values. The expert from OICA renewed his concern (GRSP-54-18-Rev.1) that the new measurement procedure would reduce the measured height by 30 mm; and that associated with the new limit of 830 mm would result in increasing the height of the head restraints by 60 mm compared to the current requirements. Finally, GRSP agreed to resume consideration of this agenda item on the basis of final proposals submitted by the IWG and of further justification concerning ECE/TRANS/WP.29/GRSP/2013/17 and to keep GRSP-54-18- Rev.1 and GRSP-54-23 as references.