Progress report on the GRE-IWG SLR’s work to simplify UN Lighting Installation Regulations. The document presents baseline documents for UN R48, UN R53, UN R74, and UN R86, with editorial review and technical amendments. Stage 2/Step 2 submissions include consolidated texts and amendments highlights for each regulation, old transitional provisions, and proposals for corrections to UN R149 and UN R150. Ongoing discussions address rear direction indicator visibility, apparent surface definitions, and single lamp separation distance. The SLR package is scheduled for informal submission at GRE-95 in October 2026, final formal submission at GRE-96 in April 2027, and adoption at WP.29 in November 2027.