This document is a working draft describing the complementary specifications to R49 (Revision 6-6 series of amendments) in order to enable the type approval of new EURO VI heavy duty dual-fuel engines and vehicles. The document is under review within the GFV.

Status report of the HDDF task force for presentation to the Working Party on Pollution and Energy during its 63rd session.

Report from the January 17, 2012 session of the Gaseous-Fuelled Vehicles Informal Group.