1. The Working Party on Noise and Tyres (GRBP) held its seventy-ninth session from 6 to 9 February 2024 in Geneva. The meeting was chaired by Mr. S. Ficheux (France). Experts from the following countries participated in the work following Rule 1(a) of the Rules of Procedure of the World Forum for Harmonization of Vehicle Regulations (WP.29) (TRANS/WP.29/690/Rev.2): Canada, China, Czechia, Finland, France, Germany, India, Italy, Japan, Netherlands, Norway, Republic of Korea, Russian Federation, Spain, Sweden, Switzerland and United Kingdom of Great Britain and Northern Ireland. Experts from the European Commission participated. Experts from the following non-governmental organizations also participated: American Automotive Policy Council (AAPC), Bureau International Permanent des Associations de Vendeurs et Rechapeurs de pneumatiques (BIPAVER), European Tyre and Rim Technical Organization (ETRTO), Imported Tyre Manufacturers Association (ITMA), International Motorcycle Manufacturers Association (IMMA), International Organization for Standardization (ISO), International Organization of Motor Vehicle Manufacturers (OICA), Pew Environment Group and World Blind Union (WBU).

2. GRBP considered and adopted the agenda (ECE/TRANS/WP.29/GRBP/2024/1, as amended by GRBP-79-01). GRBP noted the running order proposed by the Chair (GRBP-79-18-Rev.1). The informal documents are listed in annex I of the session report. The GRBP informal groups are given in annex III.

GRBP-79-01 | GRBP: Updated agenda for the 79th (February 2024) session

GRBP-79-18/Rev.1 | GRBP: Running order of the agenda for the 79th (February 2024) session

GRBP/2024/1 | GRBP: Annotated provisional agenda for the 79th (February 2024) session

3. Recalling its previous discussion on ECE/TRANS/WP.29/GRBP/2023/14 and ECE/TRANS/WP.29/GRBP/2023/15, GRBP considered revised proposals for the use of the latest standard ISO 10844:2021 test track which had been submitted by the experts from France, IMMA and ISO (GRBP-79-13 and GRBP-79-14). GRBP adopted the proposals, as laid down in GRBP-79-13 and GRBP-79-14, and requested the secretariat to submit them for consideration and vote at the June 2024 sessions of WP.29 and the Administrative Committee (AC.1) as draft Supplement 3 to the 05 series of amendments and draft Supplement 11 to the 04 series of amendments to UN Regulation No. 41.

GRBP-79-13 | UN R41: Proposal to replace ECE/TRANS/WP.29/GRBP/2023/15 Replace the proposal for Supplement 3 of the 05 Series of amendments

GRBP-79-14 | UN R41: Proposal to replace ECE/TRANS/WP.29/GRBP/2023/14 Proposal to replace the Supplement 11 of the 04 Series of amendments

4. The expert from IMMA presented interpretation documents GRBP-79-15, GRBP-79-16 and GRBP-79-38 on the application of the Real Driving Additional Sound Emission Provisions (RD-ASEP) in the 05 series of amendments to UN Regulation No. 41. He explained that the objective of his documents was to avoid an excessive number of test runs through the proposed interpretation of the number of test points and the applicable test speed. Following a brief exchange of views, GRBP invited its experts to send their comments to IMMA and decided to revert to this topic at the next session.

GRBP-79-15 | UN R41: Interpretation document with regards to the number of test points when performing test runs for type approval

GRBP-79-16 | UN R41: Interpretation document with regards applicable test speed of the motorcycle when performing test runs for type approval

GRBP-79-38 | UN R41: Introduction to the proposed interpretation documents

5. The expert from the Informal Working Group on Measurement Uncertainties (IWG MU) presented their final report (GRBP-79-02) and a draft document for reference (ECE/TRANS/WP.29/GRBP/2024/8 and GRBP-79-48-Rev.1). During an in-depth discussion, several experts from contracting parties expressed concerns about the formal adoption of the document for reference and its legal status. They pointed out that the document could be misinterpreted as being legally binding and modifying the established sound limits in UN Regulation No. 51. In the absence of consensus, GRBP postponed the discussion to the next session.

GRBP-79-02 | Noise measurement uncertainties status report to GRBP

GRBP-79-48/Rev.1 | Noise Measurement Uncertainties: Proposal to amend GRBP/2024/8

GRBP/2024/8 | Measurement uncertainties when testing in UN Regulations under the purview of GRBP Proposal from the Measurement Uncertainties informal group for a Document for Reference providing a general approach on how to handle measurement uncertainties in UN Regulations (initially addressing UN Regulations Nos. 51 and 117).

6. GRBP took note of the status report of IWG RD-ASEP (GRBP-79-11).

GRBP-79-11 | IWG ASEP: Status report

7. The expert from OICA presented a proposal with corrections and clarifications on the power definition, calibration, temperature correction and reference sound assessment (GRBP-79-33-Rev.1). Subject to deletion of the second occurrence of double paragraph 2.8., GRBP adopted the proposal and requested the secretariat to submit it for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as draft Supplement 10 to the 03 series of amendments to UN Regulation No. 51.

GRBP-79-33/Rev.1 | UN R51: Proposal for a supplement 10 to the 03 series of amendments Some corrections and clarifications concerning power definition, calibration, temperature correction and Reference sound assessment

8. The expert from OICA proposed to extend the ASEP provisions from annex 7 of the 03 series of amendments to UN Regulation No. 51 to electric vehicles (GRBP-79-43). GRBP invited its experts to provide comments to OICA, with the aim of continuing discussion at the next session, based on an official document.

GRBP-79-43 | UN R51: Proposal for a supplement 11 to the 03 series of amendments In introducing ASEP in Annex 7 in 2016, the scope was limited to vehicles with internal combustion engines (ICE) based on the experience of variabilities in the exhaust silencing systems. Electric driven vehicles have been exempted from ASEP. For electric driven vehicles the new UN Regulation No. 138, dealing with the reduced audibility of these vehicles, was worked out until 2017. At that moment no one expected sound enhancement systems beyond the scope and aim of UN R138. This proposal is an approach to address the concern that electric vehicles might be equipped with sound enhancement systems beyond the scope and aim of UN R138. This proposal does not require any changes to UN R138.01. This proposal is given as a supplement to enable the quickest entry into force, providing all manufacturers clear direction on the design of sound enhancement systems.

9. The expert from OICA presented an interim report on the ongoing ASEP/ RD-ASEP study (GRBP-79-45) which included a first set of data on RD-ASEP monitoring according to the 03 series of amendments to UN Regulation No. 51. GRBP noted the low response rate and encouraged all type approval authorities and technical services of contracting parties applying UN Regulation No. 51 to transmit the relevant data, as a sufficient number of datasets are needed to conduct a good study. In reply to a question from the expert of EC, the expert of OICA indicated that they would need around 1,000 data sets to conduct a good study on RD-ASEP. The expert from OICA also clarified that only an excel data sheet should be transmitted, without a pdf report.

GRBP-79-45 | ASEP / RD-ASEP Study

10. GRBP recalled its earlier discussion on ECE/TRANS/WP.29/GRBP/2023/16 and considered a revised proposal for the use of the latest standard ISO 10844:2021 test track which had been submitted by the experts from France, IMMA and ISO (GRBP-79-17). GRBP adopted the proposal, as contained in GRBP-79-17, and requested the secretariat to submit it for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as draft Supplement 6 to the 02 series of amendments to UN Regulation No. 63.

GRBP-79-17 | UN R63: Proposal to replace GRBP/2023/16 Proposal to replace proposal for Supplement 6 of the 02 Series of amendments

GRBP/2023/16 | UN R63: Proposal for Supplement 6 to the 02 series of amendments Proposal to allow using the state-of-the-art test track from the latest standard ISO 10844:2021.

11. GRBP recalled that, at its previous session, it had adopted the guidelines on antitampering provisions for Non-Original Replacement Exhaust Silencing Systems (NORESS) prepared by the expert from IMMA (ECE/TRANS/WP.29/GRBP/2023/17). GRBP invited IMMA and interested contracting parties to continue their activities with the aim of integrating the guidelines into the legal text of UN Regulation No. 92.

GRBP/2023/17 | UN R92: Proposal for a reference document Proposal to provide industry guidelines on anti-tampering provisions for Non-Original Replacement Exhaust Silencing Systems (NORESS) in UN Regulation No. 92.

12. The expert of the Task Force on Quiet Road Transport Vehicles (TF QRTV) presented their proposals for a new series of amendments to UN Regulation No. 138 (ECE/TRANS/WP.29/GRBP/2024/2, GRBP-79-34-Rev.1). The expert from ISO tabled further clarifications based on the final draft international standard ISO 16254 (GRBP-79-30). The expert from Australia withdrew their comments in GRBP-79-41.

13. Some experts from contracting parties supported the proposals as striking a delicate balance between road safety and environmental noise, while some others expressed their wish to postpone a decision on the proposals to the September 2024 session of GRBP. The expert of EC expressed that, albeit less ambitious than the European Union policy on noise reduction would prescribe, they could still support this proposal while at the same time work on further improvements for the next GRBP session.

14. The representative of WBU welcomed the mandatory acoustic vehicle alert system (AVAS) sound in reverse driving as contributing to the safety of blind people. He also appreciated optional AVAS sound at stationary as well as above the mandatory AVAS speed range of 0 to 20 km/h.

15. The expert from OICA raised concerns over the proposals (GRBP-79-44), in particular, the definition of “natural sound” as not being technologically neutral, and the sound limit in the speed range between 20 and 50 km/h.

16. As a compromise, the Chair of TF QRTV submitted an updated version (GRBP-79-34-Rev.2). Following an in-depth discussion, GRBP adopted the revised proposals, as amended by GRBP-79-34-Rev.2 and requested the secretariat to submit them for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as the draft 02 series of amendments to UN Regulation No. 138. The expert of EC pointed out that the new version went further towards disconnecting AVAS from safety issues, and clearly stated concern on this new proposal.

GRBP-79-30 | UN R138: Proposal for Supplement 1 to the 02 series of amendments Proposal aims to reflect the latest status of the ISO/FDIS 16254 draft and to reflect the understanding of the intent of the QRTV working group.

GRBP-79-34/Rev.2 | UN R138: Proposal to amend GRBP/2024/2 Updated proposal for a 02 series of amendments to specify the working principles of an Acoustic Vehicle Alerting System (AVAS) and to reduce measurement uncertainties during the measurement of the one third octave bands.

GRBP-79-41 | UN R138: Proposal to amend GRBP/2024/2

GRBP-79-44 | UN R138: Position paper on the proposed 02 series of amendments

GRBP/2024/2 | UN R138: Proposal for a new 03 series of amendments Proposal to specify the working principles of an Acoustic Vehicle Alerting System (AVAS) and to reduce measurement uncertainties during the measurement of the one third octave bands.

17. The expert from ETRTO proposed several corrections (ECE/TRANS/WP.29/GRBP/2024/15). GRBP adopted the proposal and requested the secretariat to submit it for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as draft Supplement 26 to the 02 series of amendments to UN Regulation No. 30.

GRBP/2024/15 | UN R30: Proposal for Supplement 26 to the 02 series of amendments Proposal for editorial corrections.

18. The expert from France proposed aligning annex 9 with annex 1 (ECE/TRANS/WP.29/GRBP/2024/14). GRBP adopted the proposal and decided to combine it with draft Supplement 27 to UN Regulation No. 54 that had been submitted for consideration of WP.29 at its March 2024 session (ECE/TRANS/WP.29/2024/2). To this end, GRBP instructed the Chair to withdraw ECE/TRANS/WP.29/2024/2 from the WP.29 agenda of March 2024, with the aim to submit a combined proposal to the June 2024 session of WP.29.

GRBP/2024/14 | UN R54: Proposal for amendments Proposal to align Annex 9 with Annex 1 (paragraphs 5., 6. and 7.) and to enable type approval authorities to make the connection with the relevant reports.

19. The Small Working Group on Retreaded Tyres Regulations tabled a new draft UN Regulation on the type approval of retreaded tyres with respect to their snow grip performance and traction tyre classification (ECE/TRANS/WP.29/GRBP/2024/11, GRBP-79-28-Rev.1). GRBP adopted the proposal, as amended by GRBP-79-29-Rev.1 and requested the secretariat to submit it for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as a new draft UN Regulation.

20. In conjunction with the above proposal, the small working group also presented proposals for amendments to UN Regulations Nos. 108 and 109 which moved the prescriptions for snow grip performance of retreaded tyres and their classification as traction tyres from these UN Regulations to the newly adopted draft UN Regulation (ECE/TRANS/WP.29/GRBP/2024/3, ECE/TRANS/WP.29/GRBP/2024/13, GRBP-79-24, GRBP-79-26). GRBP adopted the proposals, based on ECE/TRANS/WP.29/GRBP/2024/13 as amended by GRBP-79-24 and GRBP-79-25, as well as on ECE/TRANS/WP.29/GRBP/2024/3 as amended by GRBP-79-26 and GRBP-79-27, and requested the secretariat to submit them for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as a draft 01 series of amendments to UN Regulation No. 108 and a draft 01 series of amendments to UN Regulation No. 109.

GRBP-79-24 | UN R108: Proposal for 01 Series of amendments Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/13

GRBP-79-25 | UN R108: Consolidation of 01 series of amendments Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/13 amended by GRBP-79-24.

GRBP-79-26 | UN R109: Proposal for 01 series of amendments Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/03

GRBP-79-27 | UN R109: Proposal for 01 series of amendments Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/03 amended by GRBP-79-26..

GRBP-79-28/Rev.1 | Retreaded tyres snow performance/traction: Proposal for a new UN Regulation This consolidated document amends and supersedes GRBP/2024/11.

GRBP-79-29/Rev.1 | Retreaded tyres snow/traction: Proposal for a new UN Regulation Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/11 amended by GRBP-79-28-Rev.1.

GRBP/2024/11 | Retreaded tyres snow performance and/or classification as traction tyre: Proposal for a new UN Regulation Proposal from the ad hoc working group on retreaded tyres to move provisions for snow grip performance of retreaded tyres and their classification as traction tyres from UN R108 and R109 into a new UN Regulation on type approval of retreaded tyres of classes C1, C2 and C3 with respect to their snow grip performance and/or classification as traction tyre.

GRBP/2024/13 | UN R108: Proposal for a 01 series of amendments Proposal from the ad hoc working group on retreaded tyres to move provisions for snow grip performance of retreaded tyres and their classification as traction tyres from UN R108 into a new UN Regulation on type approval of retreaded tyres of classes C1, C2 and C3 with respect to their snow grip performance and/or classification as traction tyre.

GRBP/2024/3 | UN R109: Proposal for a 01 series of amendments Proposal from the ad hoc working group on retreaded tyres to move provisions for snow grip performance of retreaded tyres and their classification as traction tyres from R109 into a new UN Regulation on type approval of retreaded tyres of classes C1, C2 and C3 with respect to their snow grip performance and/or classification as traction tyre.

21. GRBP was briefed on the activities of the Informal Working Group on Wet Grip Performance for Tyres in a Worn State (IWG WGWT) (GRBP-79-46).

GRBP-79-46 | Wet Grip on Worn Tyres informal group status report to GRBP

22. The expert of ETRTO tabled proposals for a new Supplement to the 04 series of amendments with the aim to introduce editorial corrections and the new C3 reference test tyres (ECE/TRANS/WP.29/GRBP/2024/4, ECE/TRANS/WP.29/GRBP/2024/6, GRBP-79-21). The experts from France and Japan commented on the proposals (GRBP-79-50 and GRBP-79-07). GRBP adopted the proposals in ECE/TRANS/WP.29/GRBP/2024/4 as amended by GRBP-79-50 and in ECE/TRANS/WP.29/GRBP/2024/6 as amended by GRBP-79-21, and requested the secretariat to submit them for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as part of draft Supplement 2 to the 04 series of amendments to UN Regulation No. 117.

GRBP-79-07 | UN R117: Proposal for amendment to Supplement 16 to 02 series of amendments

GRBP-79-21 | UN R117: Proposal for Supplement 2 of the 04 Series of amendments Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/06

GRBP-79-50 | UN R117: Proposal for amendments to document GRBP/2024/4

GRBP/2024/4 | UN R117: Proposal for Supplement 2 to the 04 series of amendments Proposal to reduce noise measurement variability, completing the amendment proposal adopted at the seventy-eighth session of the Working Party on Noise and Tyres (informal document GRBP-78-05 replacing ECE/TRANS/WP.29/GRBP/2023/19).

GRBP/2024/6 | UN R117: Proposal for Supplement 2 to the 04 series of amendments Proposal to complete the amendment proposal adopted at the 78th GRBP session (informal document GRBP-78-05 replacing ECE/TRANS/WP.29/GRBP/2023/19).

23. The expert of ETRTO submitted proposals for a new Supplement to the 03 series of amendments with the aim to introduce editorial corrections, a temperature correction to decrease measurement uncertainties and the new C3 reference test tyres (ECE/TRANS/WP.29/GRBP/2024/9, ECE/TRANS/WP.29/GRBP/2024/12, GRBP-79-22). The experts from France and Japan commented on the proposals (GRBP-79-49 and GRBP-79-08). GRBP adopted the proposals in ECE/TRANS/WP.29/GRBP/2024/9 as amended by GRBP-79-22 and in ECE/TRANS/WP.29/GRBP/2024/12 as amended by GRBP-79-49 and requested the secretariat to submit them for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as draft Supplement 2 to the 03 series of amendments to UN Regulation No. 117.

GRBP-79-08 | UN R117: Proposal for Supplement 2 to the 03 Series of amendments

GRBP-79-22 | UN R117: Proposal for Supplement 2 to the 03 Series of amendments Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/09

GRBP-79-49 | UN R117: Proposal for amendments to the working document GRBP/2024/12

GRBP/2024/12 | UN R117: Proposal for Supplement 2 to the 03 series of amendments Proposal for editorial improvements and updates to ISO and ASTM standards references and to align with Supplement 2 to the 04 series of amendments, including a new temperature correction formula for the rolling sound emissions of tyres of classes C1 and C2 and to remove the content of the now obsolete Annex 4 as well as all its references.

GRBP/2024/9 | UN R117: Proposal for Supplement 2 to the 03 series of amendments Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped.

24. Similarly, the expert of ETRTO submitted proposals for a new Supplement to the 02 series of amendments which introduced editorial corrections, a temperature correction to decrease measurement uncertainties and the new C3 reference test tyres (ECE/TRANS/WP.29/GRBP/2024/5, ECE/TRANS/WP.29/GRBP/2024/7, GRBP-79-23). The expert from Japan commented on the proposals (GRBP-79-09). GRBP adopted the proposals in ECE/TRANS/WP.29/GRBP/2024/5 and in ECE/TRANS/WP.29/GRBP/2024/7 as amended by GRBP-79-23 and requested the secretariat to submit them for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as draft Supplement 16 to the 02 series of amendments to UN Regulation No. 117.

GRBP-79-09 | UN R117: Proposal for Supplement 16 to 02 Series of amendments

GRBP-79-23 | UN R117: Proposal for Supplement 16 to the 02 Series of amendments Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/07

GRBP/2024/5 | UNN R117: Proposal for Supplement 16 to the 02 series of amendments Proposal to introduce a new temperature correction formula for the rolling sound emissions of tyres of classes C1 and C2, to remove the content of the now obsolete Annex 4 as well as all its references, to update references to standards, and to make editorial improvements for clarity and consistency across tyre regulations.

GRBP/2024/7 | UN R117: Proposal for Supplement 16 to the 02 series of amendments Proposal to improve the reproducibility of the snow grip test method by replacing the current reference tyres C3 SRTTs 19.5 and 22.5 with the new reference tyres C3 SRTTs 19.5 and 22.5 siped.

25. During consideration of the above amendment proposals to various series of amendments to UN Regulation No. 117, GRBP took note of supporting material by Japan (GRBP-79-10) and by ETRTO (GRBP-79-36), as well as a summary table of all submitted documents (GRBP-79-35-Rev.2).

GRBP-79-10 | UN R117: Proposal for amendments to GRBP/2024/6, 7 and 9

GRBP-79-35/Rev.1 | UN R117: Overview of current documents

GRBP-79-36 | UN R117: New design C3 SRTTs - Snow performance; Additional Explanations

26. The expert from AAPC presented draft amendments that allowed, under certain conditions and weight limits, the use of LT-marked tyres with a rolling resistance greater than the current limits in UN Regulation No. 117 (ECE/TRANS/WP.29/GRBP/2024/17). The experts from Japan and the United Kingdom indicated that the proposed amendments would lead to relaxation of the current requirements. The expert from France pointed out that he would need more time to study the consequences of the proposal. GRBP agreed to continue consideration of this matter at the next session.

GRBP/2024/17 | UN R117: Proposal to amend the 02, 03 and 04 series of amendments Proposal to allow the use of LT-marked tyres under certain conditions and weight limits with a rolling resistance greater than the current limits.

27. The expert from the Russian Federation proposed clarifying certain provisions (ECE/TRANS/WP.29/GRBP/2024/16). The proposal received comments from the experts of France, Germany, Netherlands and ETRTO (GRBP-79-20). In reply, the expert from the Russian Federation tabled a revised proposal (GRBP-79-32). The expert from Germany made a study reservation on GRBP-79-32. Finally, GRBP agreed to revert to this issue at the next session.

GRBP-79-20 | UN R124: Proposal for a new Supplement

GRBP-79-32 | UN R124: Proposal for Supplement 4 to the 00 series of amendments This document supersedes the proposal in ECE/TRANS/WP.29/GRBP/2024/16

GRBP/2024/16 | UN R124: Proposal for a Supplement Proposal to clarify the text:<ul><li>Term "construction materials"</li><li>interpretation of paras. 2.2.4. and 2.2.8.</li><li>supplement technical description of the wheel with information describing production quality control</li><li>option for additional consumer-oriented marking</li><li>clarify Annex 4 and exclude aluminum-alloy and magnesium-alloy wheels under test (b)</li><li>clarify Annex 6 with regard to possible defects caused by the production process and not affecting the appearance of cracks during testing</li><li>recommend under Annex 6 to identify cracks occurred as a result of the test by using penetrating paints</li><li>clarify Annexes 7 and 8 with regard to air leakage.</li></ul>

28. The expert of the Task Force on Tyre Abrasion (TF TA) reported on their activities (GRBP-79-47-Rev.1) and proposed to revise the TF TA Terms of Reference (GRBP-79-31). GRBP adopted the revised Terms of Reference, as contained in annex 2.

GRBP-79-31 | TF Tyre Abrasion: Updated Terms of Reference

GRBP-79-47/Rev.1 | Tyre Abrasion task force status report to GRBP

29. The expert of TF TA presented a proposal for a Supplement to the 04 series of amendments to UN Regulation No. 117 that introduced test methods to measure tyre abrasion (ECE/TRANS/WP.29/GRBP/2024/10, GRBP-79-12-Rev.2). Subject to correcting the references to 5.7.-5.10. in paragraph 3.1., GRBP adopted the proposal, as amended by GRBP-79-12-Rev.2 and requested the secretariat to submit it for consideration and vote at the June 2024 sessions of WP.29 and AC.1 as part of draft Supplement 2 to the 04 series of amendments to UN Regulation No. 117.

GRBP-79-12/Rev.2 | UN R117: Proposal for amendments to GRBP/2024/10 Amendments from the Task Force on Tyre Abrasion (TFTA) to the proposal to introduce test methods to measure tyre abrasion.

GRBP/2024/10 | UN R117: Proposal for Supplement 02 to the 04 series of amendments Proposal from Task Force on Tyre Abrasion (TFTA) to introduce test methods to measure tyre abrasion.

30. GRBP noted the outcome of a tyre abrasion study for vehicles of categories M and N conducted by OICA (GRBP-79-37).

GRBP-79-37 | UN R117: Tyre Abrasion Study for vehicles of category M & N

31. No issues were discussed under this agenda item.

32. GRBP took note of the Task Force on Vehicle Sound (TF VS) status report (GRBP-79-40).

GRBP-79-40 | TF Vehicles' Sound: Status Report

33. No proposal was considered under this agenda item.

34. No new information was provided.

35. GRBP took note of the highlights of the November 2023 session of WP.29 on GRBP and common issues (GRBP-79-19).

GRBP-79-19 | General information and WP.29 highlights relevant to GRBP

36. The Chair presented a revised list of priorities (GRBP-79-06-Rev.1) and invited all experts to provide comments, in order to update the document accordingly.

GRBP-79-06/Rev.1 | Revised list of GRBP priorities for 2023-2024

37. The expert from the Special Interest Group on Automated Vehicles Regulation Screening (SIG AVRS) reported on their activities (GRBP-79-04, GRBP-79-05) and proposed guidelines for the future work (GRBP-79-03). GRBP adopted the guidelines and agreed to convert SIG AVRS into the Task Force on Automated Vehicle Regulation Screening (TF AVRS).

GRBP-79-03 | Regulation screening for ADS application: Guidelines of the GRBP Task Force on Automated Vehicle Regulation Screening

GRBP-79-04 | Application of regulations to ADS: Table of GRBP regulations with additional provisions

GRBP-79-05 | SIG Automated Vehicles Regulation Screening: Status update

38. The expert from France recalled annex 7 of the Consolidated Resolution on the Construction of Vehicles (R.E.3) on software updates and the WP.29 request to its subsidiary Working Parties to identify UN Regulations under their purview which may be relevant for the purposes of software updates (ECE/TRANS/WP.29/1175, paragraph 37). He proposed a draft list of such GRBP UN Regulations (GRBP-79-42). Following a brief exchange of views, GRBP agreed to come back to this issue at the next session.

GRBP-79-42 | List of relevant GRBP Regulations for software updates

39. The expert of OICA reported on the activities of an internal task force on exterior acoustic signalling established by the European Automobile Manufacturers Association (ACEA) (GRBP-79-39). GRBP took note of this information and agreed to request an update on this topic at the next session.

GRBP-79-39 | Work on Exterior Acoustic Signaling

40. To facilitate time planning for the GRBP experts, the expert of OICA volunteered to prepare a draft 2024 calendar of meetings of various GRBP informal working groups and task forces. GRBP welcomed this initiative and requested the secretariat to publish the calendar on the GRBP webpage.

41. GRBP noted that Mr. T. Berge (Norway), due to his retirement, and Mrs. E. Collot (France), due to her new position, would no longer participate in GRBP. GRBP thanked them for their valuable contributions and wished them success in the future.

42. For its eightieth session, scheduled to be held in Geneva from 17 to 20 September 2024, GRBP decided to keep the same structure for the provisional agenda. GRBP noted that the deadline for the submission of official documents to the secretariat would be 24 June 2024, twelve weeks prior to the session.