7 January 2022 New Periodic Technical Inspection – Particle Number Measurement (JRC) GRPE-85-34	GRPE-85-34	2022-01-07
15 February 2022 Agenda for the 26th PTI informal group session PTI-26-01/Rev.1	PTI-26-01/Rev.1	2022-02-15
15 February 2022 RE6: Proposal to introduce particle number emissions test for diesel vehicles with a wall flow filter (Netherlands) PTI-26-05	PTI-26-05	2022-02-15
28 June 2022 Agenda for the 28th PTI informal group session PTI-28-01	PTI-28-01	2022-06-28
31 May 2022 Minutes of the 27th PTI informal group session PTI-27-04	PTI-27-04	2022-05-31
17 June 2022 Report on results from the 27th PTI informal group session WP.29-187-21	WP.29-187-21	2022-06-17
30 May 2022 Periodic Technical Inspection: Particle Number (PN) Measurements (JRC) GRPE-86-30	GRPE-86-30	2022-05-30
2 November 2022 RE6: Proposal for amendment GRPE/2023/9	GRPE/2023/9	2022-11-02
11 November 2022 PTI informal group report to WP.29 WP.29-188-17	WP.29-188-17	2022-11-11
13 July 2022 RE6: Proposal to add a particle number (PN) test for diesel cars GRPE-86-xx	GRPE-86-xx	2022-07-13
26 April 2022 Vehicle emissions PTI: Developments in the Netherlands (Netherlands) PTI-27-03	PTI-27-03	2022-04-26
25 April 2022 RE6: Proposal for a particle number (PN) test on diesel cars GRPE-86-xx	GRPE-86-xx	2022-04-25
7 September 2022 Minutes of the 27th PTI informal group session PTI-28-04	PTI-28-04	2022-09-07