62. The Chair of GRPE and the VPSD informal group introduced GRPE-66-29, containing a report on the development of a framework system of definitions regarding vehicles, powertrains, energy converters (e.g. internal combustion engine, electric machine, fuel cell), and energy storage systems (e.g. fuel tank, fuel cylinders, battery). The definitions, developed in close cooperation with WLTP, will be submitted to GRPE, WP.29 and AC.3 to be introduced as annexes to R.E.3 and S.R.1. This will be accompanied by an explanatory report on the VPSD work. The terms and structure of the main definitions are now agreed, even if some open issues are still under consideration. A document will be submitted to GRPE in January 2014.
63. GRPE acknowledged the progress made by the group and agreed to submit to WP.29 the request for an extension of its mandate to March 2014.