12 October 2021 Draft text for a new Resolution on a Particle Number Emission Test for Periodic Technical Inspections PTI-24-02	PTI-24-02	2021-10-12
3 December 2021 Agenda for the 25th PTI informal group session PTI-25-02	PTI-25-02	2021-12-03
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
12 January 2023 PTI: PN measurement in Belgium (First Results July - October 2022) (CITA) GRPE-87-36/Rev.1	GRPE-87-36/Rev.1	2023-01-12
7 February 2023 Agenda for the 29th PTI informal group session PTI-29-01/Rev.1	PTI-29-01/Rev.1	2023-02-07
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
22 February 2023 Minutes of the 29th PTI informal group session PTI-29-05	PTI-29-05	2023-02-22
12 April 2023 COMMISSION RECOMMENDATION (EU) 2023/688: PN measurement for PTI (EC) PTI-31-03	PTI-31-03	2023-04-12
14 April 2023 Agenda for the 31st PTI informal group session PTI-31-01/Rev.1	PTI-31-01/Rev.1	2023-04-14
11 May 2023 Minutes of the 31st PTI informal group session PTI-31-05	PTI-31-05	2023-05-11
19 January 2023 PN measurement for Diesel (RDW) GRPE-87-57	GRPE-87-57	2023-01-19
2 June 2023 RE6: Proposal to amend GRPE/2023/9 GRPE-89-24/Rev.2	GRPE-89-24/Rev.2	2023-06-02
6 June 2023 Agenda for the 32nd PTI informal group session PTI-32-01	PTI-32-01	2023-06-06
16 November 2023 New PTI test for checking particulate filters of diesel cars with a particle counter WP.29-191-34	WP.29-191-34	2023-11-16
21 November 2023 Minutes of the 32nd PTI informal group session PTI-32-03	PTI-32-03	2023-11-21
4 December 2023 Agenda for the 33rd PTI informal group session PTI-33-01/Rev.1	PTI-33-01/Rev.1	2023-12-04
23 January 2024 Minutes of the 33rd PTI informal group session PTI-33-04	PTI-33-04	2024-01-23
13 February 2024 Agenda for the 34th PTI informal group session PTI-34-01/Rev.2	PTI-34-01/Rev.2	2024-02-13
23 April 2024 Agenda for the 35th PTI informal group session PTI-35-01/Rev.2	PTI-35-01/Rev.2	2024-04-23
18 June 2024 Minutes of the 35th PTI informal group session PTI-35-04	PTI-35-04	2024-06-18
10 December 2024 PTI: Agenda for the 36th (December 2024) session PTI-36-01/Rev.1	PTI-36-01/Rev.1	2024-12-10
10 December 2024 PTI informal group: Proposal for a Terms of Reference (Russia) PTI-36-02	PTI-36-02	2024-12-10
20 March Minutes of the 36th (December 2024) PTI informal group session PTI-36-03/Rev.1	PTI-36-03/Rev.1	2025-03-20
27 March Minutes of the 37th (February 2025) PTI informal group session PTI-37-07	PTI-37-07	2025-03-27
1 April PTI: Agenda for the 38th (April 2025) session PTI-38-01/Rev.1	PTI-38-01/Rev.1	2025-04-01
1 April PTI informal group: 2025-26 work plan proposal (Russia) PTI-38-03	PTI-38-03	2025-04-01