52. The representative of Japan, Co-Chair of the IWG on IWVTA, reported on the progress at the eighteenth meeting of the group. He reported that IWG had introduced two definitions for type: vehicle type, which could contain all variants regardless of their level of conformity, and which corresponded to what we are used to; and IWVTA type, which defined one level of conformity within a vehicle type. He presented informal document WP.29-166-15 on the changes required to the draft UN Regulation No. 0. He clarified that these changes would be included in the text during the September session of the group and would further be included as Revision 1 to document ECE/TRANS/WP.29/2015/68. He notified WP.29 that UN Regulation No. 0 would be pre-tested and that the contact point for pre-testing had been indicated in the informal document for anyone interested. The representative of the Russian Federation highlighted mutual proposal with the European Commission on the applicability of national and regional requirements in addition to IWVTA if there are no such requirements in the existing UN Regulations