51. GRE noted that the Working Party on Road Traffic Safety (WP.1) had adopted the definition and allowance for the Advanced Driver Assistance Systems (ADAS). WP.1 had not yet concluded its consideration of the GRE draft proposals for amendments to the 1968 Vienna Convention regarding lighting and light-signalling (ECE/TRANS/WP.1/2011/4/Rev.3) and had postponed this issue to the next session of WP.1 in September 2014.