193. The expert from the United States of America, on behalf of the Co-Chair of the IWG on the UN GTR No. 13 – Phase 2, informed AC.3 about the group’s progress. He reported that the last meeting of the IWG was held from 9 to 11 October 2018, in Brussels. He added that more than sixty participants from contracting parties, industry, standardizations organizations and academia attended the meeting. He added that the focus had mainly been on requirements for heavy duty vehicles and buses, material compatibility, tank stress rupture, fire test parameters and clarification of test procedures of the Phase 1 of the UN GTR. He added that work was carried out by five task forces on: