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UN R49: Proposal for a Supplement 3 to the 07 series of amendments
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Reference Number: WP.29/2025/94
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Proposal to introduce new provisions to accommodate type-approval of hydrogen Type 1A dual fuel engines and vehicles, modifications to include Fourier Transform Infrared (FTIR) and Quantum Cascade Laser (QCL) instruments, new provisions to accommodate monitoring on-board fuel and/or energy consumption during PEMS testing, and to amend for consistency between UN R49 and UN R83 in light of amendments to the 06 and 07 series of UN R83.
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Meeting Sessions: 197th WP.29 session (10-14
Nov 2025) and 198th WP.29 session (9-13
Mar)
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Document date: 29 Aug 25
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Document status: Adopted by WP.29
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Relevant to: UN Regulation No. 49 | Diesel and CNG/LNG Engine Emissions
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Adoption Vote
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This proposal (WP.29/2025/94) was adopted by the World Forum. Thirty-three Contracting Parties out of the 52 applying UN R49 were present for the vote by AC.1. Thirty-three voted in favor with zero against and zero abstaining.
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Click here to view the full document file
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