Download: GRBP/2025/1 from UNECE: .pdf format .docx format
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2. UN Regulation No. 9 (Noise of three-wheeled vehicles)

The Working Party on Noise and Tyres (GRBP) is invited to consider a proposal by the experts from the International Motorcycle Manufacturers Association (IMMA) that allows using the state-of-the-art test track from the latest standard ISO 10844:2021.

GRBP/2025/8 | UN R9: Proposal for Supplement 3 to the 08 series of amendments