32. In absence of the expert from Belgium, the secretary of the Working Party on General Safety Provisions (GRSG) informed GRSP that at the October 2016 session of GRSG, the expert from Belgium presented a detailed analysis showing that the removal of the safety prescriptions for trolleybuses from UN Regulation No. 107 and their insertion in UN Regulation No. 100 would avoid a double type approval process. However, GRSG did not fully support their proposal and preferred to only align both Regulations. GRSP agreed to resume discussion on this subject at its December 2017 session. The expert from France stated that his country was following with interest the development of truck with trolley and the lack of provisions for trucks in UN Regulation No. 107 will create a legislative void for this kind of vehicles. The expert from Japan informed GRSP that trolley buses were regulated by railways rules and opposed to allocate provisions on trolley into UN Regulation No. 100. GRSP agreed to resume discussion at its December 2017 session awaiting further information by the expert from Belgium and follow-up of discussion of GRSG.