Proposal to update the baseline document for UN R53 Amendment 1 to the 05 series of amendments, amending and superseding SLR-77-09, Revision 6, WP.29/2024/30, based on SLR-71-07 and related documents. The regulation applies to vehicles of category L3 regarding installation of lighting and light-signalling devices. Key provisions consolidate definitions, general and individual specifications for lamps including driving-beam and passing-beam headlamps, direction-indicator lamps, stop lamps, position lamps, retro-reflectors, fog lamps, daytime running lamps, adaptive driving-beam (ADB), rear-end collision alert signal (RECAS), and adaptive front lighting system (AFS). Requirements address lamp positioning, geometric visibility, orientation, electrical connections, tell-tales, and colorimetric specifications.