31. The expert from ETRTO introduced ECE/TRANS/WP.29/GRRF/2015/5, inserting in Regulation No. 54 high flotation tyres references. The expert from ETRTO presented ECE/TRANS/WP.29/GRRF/2015/6 introducing amendments to the marking requirements in Regulation No. 54. GRRF adopted both proposals and requested the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their June 2015 sessions as draft Supplement 20 to Regulation No. 54.