48. The Chair of the informal working group on GFV reported on the work progress made by the group (GRPE-68-23), mentioning the recent meetings that led to the adoption of GFV-related texts in 2013 by WP.29. He recalled the decision to develop a new UN Regulation for heavy duty dual fuel retrofit, providing information on the recent development of this task and reporting that an informal document on the subject is expected for the June 2014 GRPE session. Official consideration by GRPE is currently scheduled for January 2015, and WP.29 consideration for June 2015. A task force for the retrofit of heavy duty dual fuel has already been established. Issues recently discussed include the scope of the text, the concept of families, aspects related with the need for the type approval of retrofitted dual fuel engines. The question of using the retrofit notations with or without the presence of substantial modification to the emission strategies of heavy duty engines has been discussed in detail. An agreement to maintain the retrofit wording also for modifications with substantial effects on emission strategies has been reached with OICA. Future activities will focus on the consideration of fundamental principles, the liability of original equipment manufacturers after the engine conversion, and the research of solutions to address other open issues. The GFV Chair concluded by requesting the secretariat to reserve a room for a brief meeting during the June 2014 GRPE session.

49. GRPE acknowledged the progress made by the group.