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.