40. The expert from France, Chair of the IWG on Enhanced Child Restraint Systems (ECRS), introduced a presentation (GRSP-58-22) on the work progress of the IWG and introducing the proposal on the 01 and 02 series of amendments to the UN Regulation. He explained that the main content of the draft 01 series of amendments introduced: (i) some corrections to the original version of the UN Regulation, (ii) the concept of non-integral CRS and (iii) type approval provisions, including arrangements of the approval mark, for modules (GRSP-58-07-Rev.1 superseding ECE/TRANS/WP.29/GRSP/2015/24). He explained that the 02 series of amendments represented Phase 2 of the UN Regulation introducing provisions (GRSP-58-08 superseding ECE/TRANS/WP.29/GRSP/2015/31) for booster seats with backrest. GRSP adopted ECE/TRANS/WP.29/GRSP/2015/24, as amended by Annex IV to this report. The secretariat was requested to submit it to WP.29 and AC.1, for consideration and vote at their June 2016 sessions as draft 01 series of amendments to UN Regulation No. 129. Finally GRSP agreed to resume consideration on the Phase 2 of the UN Regulation at its May 2016 session and requested the secretariat to distribute GRSP-58-08 with an official symbol for that session.