Baseline document for UN R48 Stage 2 / Step 2 incorporating all agreed modifications from SLR meetings, reflecting changes documented in SLR-63-01/Rev.1, SLR-64-03, SLR-64-11, SLR-66-01, SLR-68-13/Rev.3, SLR-72-03/Rev.3, SLR-75-05/Rev.2, WP.29/2024/28 (BL09), WP.29/2025/36 (Sup.1), WP.29/2025/117 (Sup.2), WP.29/2026/33 (Sup.3), WP.29/2026/163 (Sup.4), and GRE-94-25/Rev.2, including updated IEC proposal regarding lighting source technological neutrality. Document identifies open points on apparent surface, direction-indicator visibility against stop lamps, and transitional provisions consistency with IWVTA guidelines.