Download: GRBP/2019/12 from UNECE: .pdf format .docx format
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3. UN Regulation No. 41 (Noise emissions of motorcycles)

GRBP will consider proposals submitted by the expert from IMMA which aim to correct an omission and to minimize a proliferation of approval numbers from models with differences in vehicle exhaust and silencing systems.

GRBP/2019/24 | UN R41: Proposal for a Supplement to the 04 series of amendments
GRBP/2019/25 | UN R41: Proposal for a Supplement to the 04 series of amendments
GRBP/2019/25/Rev.1 | UN R41: Proposal for a Supplement to the 04 series of amendments