4. The list of informal documents is contained in Annex I to the session report. The list of GRE informal groups is reproduced in Annex VI to the report.

35. The World Forum recalled the oral report of the Chair of GRE given during the 170th session (ECE/TRANS/WP.29/1126, paras. 47-51) and approved the report.

The proposal by Belgium GRSG/2016/05 aimed at removing the amended additional safety prescriptions for trolleybuses from annex 12 of UN Regulation No. 107 for the Construction of M2 and M3 vehicles (R107), and inserting them into UN Regulation No. 100 on Electric Powertrain Vehicles (R100), see proposal GRSP/2016/07. This document explains how the scope and technical provisions for trolleybuses of R100 and R107 are complementary, but not yet fully compatible.

5. The expert from Belgium recalled the discussion at the previous GRSG session on ECE/TRANS/WP.29/GRSG/2016/5 and presented a detailed analysis on the compatibility or incompatibility of the scopes and technical provisions for trolleybuses of UN Regulations Nos. 100 and 107 (GRSG-111-21). As an outcome of this analysis, she recommended to fully align the provisions of the UN Regulations concerned. She added that the removal of the safety prescriptions for trolleybuses from UN Regulation No. 107 and their presence in UN Regulation No. 100 on electric power trained vehicles would avoid a double type approval process. She announced her intention to also submit the outcome of the analysis to the experts of the Working Party on Passive Safety (GRSP). GRSG welcomed the important work done by the Belgium delegation.

6. The expert from France preferred to keep the provisions for trolleybuses in UN Regulation No. 107. He added that a double type approval was only necessary for hybrid vehicles and that the provisions for trolleybuses in UN Regulation No. 107 were still necessary for trolleybuses with conventional propulsion systems. The expert from Switzerland endorsed that position. The expert from the Russian Federation raised a study reservation. The expert from OICA underlined the need to align the provisions for trolleybuses in UN Regulations (e.g. ‘isolation’ to be replaced by ‘insulation’).

7. Referring to the discussion of WP.29 at its June 2016 session (report ECE/TRANS/WP.29/1123, para. 30), GRSG agreed to also involve the experts from the Working Party on Lighting and Light-Signalling (GRE) and GRSP at their forthcoming sessions. GRSG agreed to take a final decision on this subject at its next session in April 2017 awaiting the outcome of the discussion in GRE and GRSP. For that purpose, the secretariat was invited to keep GRSG-111-21 on the agenda as a reference document.

9. Referring to ECE/TRANS/WP.29/GRSG/2016/5, the expert from Belgium recalled the detailed analysis on the technical requirements for trolley buses presented at the previous session (GRSG-111-21). She confirmed that the work to fully align the provisions of UN Regulations Nos. 100 and 107 was still in progress. She announced her intention to submit concrete proposals for consideration at the next GRSG sessions.

8. Referring to GRSG-111-21 on a detailed analysis of the technical requirements for trolley buses presented at previous sessions, the expert from Belgium informed GRSG that full alignment of the provisions of UN Regulations Nos. 100 and 107 had not been achieved. GRSG agreed to remove this item from the agenda of the next GRSG session.

34. The World Forum recalled the oral report of the Chair of GRSG given during the 170th session (ECE/TRANS/WP.29/1126, paras. 42-46) and approved the report.