99. The representative of the Russian Federation, Co-Chair of the IWG on PTI, presented ECE/TRANS/WP.29/2017/93 proposing the establishment of a new Rule on Periodical Technical Inspections of motor vehicles using Compressed Natural Gas (CNG) and/or Liquefied Natural Gas (LNG) in their propulsion system to be annexed to the 1997 Agreement. Several Contracting Parties indicated that they were in the process of evaluation of the proposal. WP.29 requested the secretariat to prepare a consolidated document for the November 2017 session.