4. Regarding the proposal to remove from global technical regulation (gtr) No. 4 on the Worldwide harmonized Heavy Duty Certification procedure (WHDC) the remaining options on hot soak period and cold start weighting factors, GRPE noted that the proposal ECE/TRANS/WP.29/2010/48 had been submitted to WP.29 and AC.3, for consideration at their June 2010 sessions and establishing into the Global Registry as Amendment 2 to the gtr. With regard to the corresponding alignment of Regulation No. 49, GRPE welcomed the anticipated adoption by WP.29 at its March 2010 session of ECE/TRANS/WP.29/2010/51.