50. The secretariat introduced a draft proposal (GRPE-69-18) by GRE to introduce in the consolidated Resolution on the construction of vehicles (R.E.3) the following new vehicle categories: agricultural trailer and towed agricultural machinery. He reported that the GRE experts preferred to involve experts from other Working Parties subsidiary to WP.29 and requested the secretariat to circulate this first draft proposal. Comments may be submitted by email to the GRE secretary (GRE@unece.org)