Documentation : ECE/TRANS/WP.29/2011/147 , ECE/TRANS/WP.29/AC.3/17 131 . The Chair of GRPE presented an executive summary of the Technical Report prepared by the informal working group on HFCV Subgroup Environment ( HFCV-SGE ) that included the outcome of discussions and recommendations available in the different regions in support of the harmonization process ( ECE/TRANS/WP.29/2011/147 ) .