45. The representative from the European Commission, Chair of the IWG on PMP, introduced GRPE-86-34 giving a status report of the activities of the IWG on PMP. He asked his colleague to provide an update on all matters related to non-exhaust particulates measurement and the latest development of the UN GTR on brake particulate emissions. The representative from OICA highlighted the high variability of brake emission results during the inter-laboratory study, and wondered if such variability would be accounted for in the mission limits, if set, and asked about potential measures to reduce variability. The representative from the European Commission clarified that no emissions limits are expected to be included in the UN GTR that will focus on a harmonized test method. He highlighted that during the inter-laboratory test, only one laboratory was fully compliant with the provision set out in the Task Force 3 protocol. He expected the variability would drastically improve when the final procedure is released and all laboratories are compliant with the provisions. He kindly requested GRPE to accept a post session submission, and the consideration of the informal document through a written procedure over the summer.

46. The representative from OICA said that it is the third informal document that is expected to be submitted via written consultation, highlighting the challenges that this might pose to keep track of the progress and requested for the possibility to hold additional meetings, if need be, before the submission of working documents. The Chair reminded GRPE that the practice to have informal document consideration then working documents at the forthcoming session was not mandatory, and GRPE might be willing to show some flexibility when needed. The representatives from Sweden and the UK supported the timeline proposed by the IWG on PMP.

47. GRPE agreed to consider a draft proposal for a draft new UN GTR on brake particulate emissions as post session informal document GRPE-86-46 to be shared by the secretariat with all GRPE participants mid July 2022. GRPE asked all interested parties to provide written comments to the secretariat before 19 September 2022, to prepare a working document for the January 2023 session of GRPE.

48. The representatives from France and the European Commission, Co-Chairs of the Task Force on Tyre Abrasion (TFTA), introduced GRPE-86-23 presenting the activities of the TFTA since its recent inception. The Chair thanked the update and asked for such regular updates to GRPE on this topic.