17. The experts from Austria and the Netherlands, introduced GRSG-126-19-Rev.1 superseding ECE/TRANS/WP.29/GRSG/2023/18, aimed at clarifying the need to have a support device for centre axle trailers, independent of the type of coupling device. The expert from France suggested the amendment proposed should have gradual transitional provisions. Finally, GRSG adopted ECE/TRANS/WP.29/GRSG/2023/18 as amended by annex VI to the report. The secretariat was requested to submit the proposal as draft 03 series of amendments to UN Regulation No. 55 for consideration and vote at the March 2024 sessions of WP.29 and AC.1.

94. Under agenda items 4.8.4 to 4.8.5 the Chair of GRSG presented draft series of amendments to UN Regulations Nos. 46 and 55 to incorporate provisions on pendulum dimension for the impact test and to clarifying the need to have a support device for centre axle trailers, independent of the type of coupling device.