6 Apr 2022 Proposal for a new Consolidated Resolution concerning Exhaust Ultra-Fine Particle Number Measurement For Heavy Duty Engines WP.29/2022/105 2022-04-06
4 Mar 2022 Proposal for a Consolidated Resolution on the exhaust ultrafine particle number measurement for heavy duty engines GRPE/85/Add.1 2022-03-04
17 Jan 2022 Status report of the PMP informal group GRPE-85-37/Rev.2 2022-01-17
6 Jan 2022 Ultra-fine PN measurement for heavy-duty engines: Proposal for amendments to document GRPE/2021/17 GRPE-85-04/Rev.1 2022-01-06