The Working Party on Lighting and Light-Signalling (GRE) may wish to resume consideration of this subject, awaiting new proposals and sponsors to develop a UN Global Technical Regulation (UN GTR). At its previous session, GRE had an exchange of views on whether a new UN GTR could be developed under stage two of the simplification of the lighting and light-signalling UN Regulations (SLR) or as a result of consideration of light-signalling functions of automated/autonomous vehicles.