Exchange of communications between the secretariat and the UN Office of Legal Affairs concerning the simplification of lighting and light-signalling Regulations (SLR). GRE proposed to consolidate around 30 Regulations on different individual lighting and light-signalling devices (lamps) into three new Regulations (forward lighting, light-signalling, and retro-reflective devices). OLA provides general comments in response to GRE questions intended to ensure that the selected approach respects the legal and administrative requirements of UN treaties and specifically the 1958 Agreement.