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Document Title Key points on Exterior Sound Enhancement Systems/Exterior Sound Generator requirements
Reference Number R51/R138-11-01
Date
20 Jun 2025
Rulemaking Area(s) UN R51 Vehicle Noise and UN R138 Quiet Road Transport Vehicles
Meeting(s)
Related Documents
R51/R138-10-02 Key points on exterior sound enhancement testing requirements
Downloads
UNECE server .pdf format
GAR server .pdf format