1. The Working Party on Noise (GRB) held its sixty-first session from 27 to 29 January 2015 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, Amend. 1 and Amend. 2): Austria; Belgium; China; France; Germany; Hungary; India; Italy; Japan; Netherlands; Norway; Poland; Republic of Korea; Russian Federation; Spain; Sweden; Switzerland; United Kingdom of Great Britain and Northern Ireland. Expert from the European Commission (EC) participated. Experts from the following non-governmental organizations also participated: Conference of European Directors of Roads (CEDR); European Association of Automobile Suppliers (CLEPA); European Tyre and Rim Technical Organisation (ETRTO); International Motorcycle Manufacturers Association (IMMA); International Organization for Standardization (ISO); International Organization of Motor Vehicle Manufacturers (OICA) and World Blind Union (WBU).

2. In her opening statement Ms. Eva Molnar, Director, UNECE Transport Division, informed GRB about the recent appointment of Mr. Walter Nissler as Chief, Vehicle Regulations and Transport Innovations Section. She also mentioned the ongoing global negotiations on the Sustainable Developments Goals (SDG), which should replace the Millennium Development Goals (MDG) as of 2016, and argued in favour of including transport related goals into SDG. In this context, she introduced a new edition of the UNECE publication “Transport for Sustainable Development” addressing issues of transport safety, security and environmental performance of vehicles. Finally, she briefed GRB on the highlights of the forthcoming session of the Inland Transport Committee (24-26 February 2015).

3. GRB considered and adopted the agenda.

GRB-61-04 | General information and WP.29 highlights for the 61st GRB session

GRB/2015/1 | Annotated provisional agenda for the 61st GRB session (January 2015)

4. GRB resumed discussion on ECE/TRANS/WP.29/GRB/2014/4 by OICA proposing amendments to UN Regulation No. 28, in particular, a reduction in the prescribed sound level of the audible warning device from 93 to 87 dB(A). The expert from IMMA suggested further changes to this proposal (GRB-61-07). GRB adopted the proposal, as amended by Annex II to this report, and mandated the secretariat to submit it to WP.29 and the Administrative Committee of the 1958 Agreement (AC.1) for consideration and vote at their June 2015 sessions as draft Supplement 4 to the original series of amendments to Regulation No. 28. GRB noted that the adopted modification of the prescribed sound level makes this requirement less stringent and, thus, does not need a new series of amendments with transitional provisions.

GRB-61-07 | Proposal for amendment to ECE/TRANS/WP.29/GRB/2014/4

GRB/2014/4 | Proposal for amendments to Regulation No. 28 The current UN R28 test procedures specify voltages that cannot be reached by many vehicles' internal battery charges alone; however, the provisions can be met if the vehicle is warmed up and run at idle. Therefore, OICA proposes to allow vehicles to be run at idle during the test procedure. OICA also proposes to change the minimum sound level requirement for vehicles of category M and N and motorcycles of a power greater than 7 kW from 93 dB to 87 dB.

5. The expert from the Russian Federation pointed out that Regulation No. 28 had not been updated for a long time and proposed a number of editorial modifications (GRB-61-12). GRB welcomed this initiative and decided to consider it at the next session, based on an official document to be submitted by the expert from the Russian Federation.

GRB-61-12 | Proposal for draft amendments to UN Regulation No. 28 Proposal to update and clarify the text of UN R28.

6. The expert from IMMA proposed to introduce the calculated engine speed for various types of transmission into Regulation No. 41 (ECE/TRANS/WP.29/GRB/2015/2 and Corr. 1, Corr. 2). GRB adopted the proposal and mandated the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2015 sessions as a draft Supplement to Regulation No. 41.

GRB/2015/2 | Proposal for amendments to the 04 series of amendments to Regulation No. 41 Under the current 04 series of amendments to UN Regulation No. 41, the engine speed should be measured during all tests in Annex 3 and Annex 7 (Additional sound emission provisions - ASEP). However, IMMA has found that there is very little difference between the measured and the calculated engine speed for a manual transmission (MT) vehicle (Annex, figure 1) and no impact on the test result (Annex, figure 2). Therefore, this proposal would introduce a calculated engine speed for MT vehicles and for continuously variable transmission (CVT)/automatic transmission (AT) with locked gear mechanism into UN Regulation No. 41.

GRB/2015/2/Corr.1 | Proposal for amendments to the 04 series of amendments to Regulation No. 41 - Corrigendum Correction to the text of the proposed amendment to introduce a calculated engine speed for manual transmission vehicles and for continuously variable transmission (CVT)/automatic transmission (AT) with locked gear mechanism into UN Regulation No. 41.

GRB/2015/2/Corr.2 | Proposal for amendments to the 04 series of amendments to Regulation No. 41 - Corrigendum 2 Correction of typographical errors in the original proposal (document GRB/2015/2): "locked" instead of "rocked".

7. The expert from IMMA also proposed to amend paragraph 8.2. of Regulation No. 41 on the conformity of production (GRB-61-11). GRB decided to address this issue at the next session on the basis of an official document by IMMA.

GRB-61-11 | Proposal to amend R41-04 to formalize the GRB interpretation of the conformity of production In response to concerns that approval agencies may not grant manufacturers the additional 1dB for L(wot) on conformity of production tests as changes had been made to Annex 6 of R41-04, GRB issued an interpretation recorded in the report of its 56th session. However, IMMA believes that industry and agency personnel may still not be aware of the interpretation. Therefore, IMMA proposes to codify the interpretation within UN R41.

8. On behalf of the Informal Working Group (IWG) on UN Regulations Nos. 51 and 59, the expert from OICA introduced further proposals for amendments to the 03 series of amendments to UN Regulation No. 51 (ECE/TRANS/WP.29/GRB/2015/3 and Corr.1). The expert from Japan expressed concerns about a relaxation clause for a specific category of vehicles included in these proposals (GRB-61-05) and proposed an alternative wording. Further corrections were suggested by the experts from the Netherlands (GRB-61-08), Spain, the European Commission and OICA. Finally, GRB adopted the proposals, as amended by Annex III to this report.

GRB-61-05 | Japan’s comments on the proposed 03 series of amendments to UN Regulation No. 51

GRB-61-08 | Proposal for amendments to the 03 series of amendments to Regulation No. 51 Proposal to correct the Annex 7, paragraph 3.1. "Determination of the anchor point for each gear ratio" and a calculation symbol in paragraph 3.2.1 "Calculation of the slope of the regression line for each gear".

GRB/2015/3 | Proposal for amendments to the 03 series of amendments to Regulation No. 51 This proposal further refines and clarifies the 03 series of amendments to UN R51 from Informal Working Group on UN Regulations Nos. 51 and 59. The 03 series was proposed in document GRB/2014/5 which was amended and then adopted by the Working Party on Noise during its 60th session. The proposal includes special provisional limits for Chinese micro-vehicles which are being reviewed by Japan.

GRB/2015/3/Corr.1 | Proposal for amendments to the 03 series of amendments to Regulation No. 51 - Corrigendum Correction to the text proposed by the informal working group on the revision of UN Regulations No. 51 and No. 59 to further refine UN R51.

9. GRB recalled that, at its previous session, it had adopted the draft 03 series of amendments to Regulation No. 51 (ECE/TRANS/WP.29/GRB/2014/5, ECE/TRANS/WP.29/GRB/58, para. 5 and Annex III) which had subsequently been submitted to WP.29 and AC.1 for consideration and vote at their March 2015 sessions as document ECE/TRANS/WP.29/2015/3. With regard to the additional proposals adopted at this session (para. 8 above and Annex III to this report), GRB noted two options for their processing:

• (i) submit them separately to WP.29 and AC.1 for consideration and vote at their June 2015 session as a draft Supplement 1 to the 03 series of amendments to Regulation No. 51; or
• (ii) combine them with the 03 series of amendments to Regulation No. 51 (ECE/TRANS/WP.29/2015/3) in a single document and submit it to WP.29 and AC.1 for consideration and vote at their June 2015 sessions. In this case, WP.29 and AC.1 would be requested not to consider document ECE/TRANS/WP.29/2015/3 in March 2015.

10. GRB supported option (ii) and mandated its Chair to report about this decision to WP.29, AC.1 and the Administrative Committee for the Coordination of Work (AC.2) at their sessions in March 2015. GRB also noted that IWG on UN Regulations Nos. 51 and 59 had completed its tasks and that the extension of its mandate was not necessary.

GRB-61-05 | Japan’s comments on the proposed 03 series of amendments to UN Regulation No. 51

GRB-61-08 | Proposal for amendments to the 03 series of amendments to Regulation No. 51 Proposal to correct the Annex 7, paragraph 3.1. "Determination of the anchor point for each gear ratio" and a calculation symbol in paragraph 3.2.1 "Calculation of the slope of the regression line for each gear".

GRB-61-19 | Consolidated proposal for the 03 series of amendments to Regulation No. 51 This document contains the consolidated text of proposals for the 03 series of amendments to Regulation No. 51, as adopted by GRB at its sixtieth and sixty-first sessions: - ECE/TRANS/WP.29/GRB/58, para. 5, based on ECE/TRANS/WP.29/GRB/2014/5, as amended by Annex III to ECE/TRANS/WP.29/GRB/58;1 and - ECE/TRANS/WP.29/GRB/59, paras. 8-10, based on ECE/TRANS/WP.29/GRB/2015/3 and Corr.1, as amended by Annex III to ECE/TRANS/WP.29/GRB/59. Following a decision of GRB, this consolidated text will be submitted to the June 2015 session of WP.29 for consideration and possible adoption.

GRB/2014/5 | Proposal for the 03 series of amendments to Regulation No. 51 Proposal from the expert group on UN R51 and UN R59 to update the provisions of UN Regulation No. 51.

GRB/2015/3 | Proposal for amendments to the 03 series of amendments to Regulation No. 51 This proposal further refines and clarifies the 03 series of amendments to UN R51 from Informal Working Group on UN Regulations Nos. 51 and 59. The 03 series was proposed in document GRB/2014/5 which was amended and then adopted by the Working Party on Noise during its 60th session. The proposal includes special provisional limits for Chinese micro-vehicles which are being reviewed by Japan.

GRB/2015/3/Corr.1 | Proposal for amendments to the 03 series of amendments to Regulation No. 51 - Corrigendum Correction to the text proposed by the informal working group on the revision of UN Regulations No. 51 and No. 59 to further refine UN R51.

WP.29/2015/3 | Proposal for the 03 series of amendments to Regulation No. 51 Proposal from the expert group on UN R51 and UN R59 as approved by the GRB to update the provisions of UN Regulation No. 51.

11. No new information was reported under this item.

12. GRB considered additional proposals for the 02 series of amendments to Regulation No. 59 prepared by IWG on Regulations Nos. 51 and 59 (ECE/TRANS/WP.29/GRB/2015/4). GRB adopted these proposals, as amended by Annex IV to this report, and mandated the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their June 2015 sessions as a draft Supplement 1 to the 02 series of amendments to Regulation No. 59.

GRB/2015/4 | Proposal for the 02 series of amendments to Regulation No. 59 Further refinements to the 02 series of amendments prepared by the Informal Working Group on UN Regulations Nos. 51 and 59. This submission proposes to clarify the amended text of document GRB/2014/6 which was approved during the 60th session of the Working Party on Noise and sent to WP.29 for consideration to adopt.

13. No new information was given under this agenda item.

14. GRB continued its consideration of the revised proposal for new time measurement accuracy for the rolling resistance method (ECE/TRANS/WP.29/GRB/2014/8). The expert from Japan introduced several modifications to this proposal (GRB-61-06). GRB adopted the proposal, as contained in Annex V to this report, and mandated the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2015 sessions as a draft Supplement 8 to the 02 series of amendments to Regulation No. 117. GRB also noted that the Working Party on Brakes and Running Gear (GRRF), at its February 2015 session, would consider a corrigendum to Supplement 6 to the 02 series of amendments to Regulation No. 117 (ECE/TRANS/WP.29/GRRF/2015/9).

GRB-61-06 | Proposal for amendments to Regulation No. 117 Proposal from Japan, pursuant to the discussion of document GRB/2014/8 during the previous GRB session, to correct perceived inconsistencies in time measurement accuracy in annex 6.

GRB/2014/8 | Proposal for Supplement 7 to the 02 series of amendments to Regulation No. 117 At the 58th GRB session, the expert from ETRTO introduced GRB-58-02, proposing new time measurement accuracy for instrumentation involved in the rolling resistance method (Annex 6 of the UN Regulation). The expert from the Russian Federation introduced GRB-58-13, arguing that this change of accuracy was not needed for Annex 6. This present revised proposal has been prepared the ETRTO and approved by Russia.

GRRF/2015/9 | Proposal for a corrigendum of Supplement 6 to the 02 series of amendments to Regulation No. 117 Proposal to restore transitional provisions incorrectly deleted by Supplement 6 to the 02 series of amendments.

15. The expert from France presented the results of testing tyres of commercial vehicles (classes C2 and C3) for the deceleration test method using the dω/dt form for measuring rolling resistance (GRB-61-09). The aim of this study was to compare the measurements obtained at a dedicated and non-dedicated rolling resistance machine. The results at the non-dedicated rolling resistance machine demonstrated a poor repeatability of the measurements, thus leaving open the question whether or not such machines are suitable for the proposed deceleration test method. GRB was of the view that further studies would be necessary and encouraged other laboratories to conduct such tests.

GRB-61-09 | Method of deceleration measuring and data processing for tyre rolling resistance determination Pursuant to the introduction of the deceleration method for measuring tire rolling resistance using the dω/dt approach (“Deceleration Calculator”) proposed by NAMI and accepted by GRB, UTAC (France) provides information on the results of tests conducted to confirm repeatability and reproducibility of the new method using different machines.

16. The expert from ETRTO referred to the ongoing work of updating references to the new version of ISO standard 10844:2014 (see para. 17 below) and proposed similar amendments to Annex 3 of Regulation No. 117 (GRB-61-14). The expert of ISO recalled his presentation on the comparison between the 2014 and 2011 versions of ISO 10844 (GRB-60-17) and confirmed that only editorial modifications had been introduced without any technical changes. Thus, GRB agreed that no transitional provisions were required in this case. GRB adopted the proposal, as contained in Annex VI to this report, and mandated the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2015 sessions as a draft supplement to Regulation No. 117.

GRB-60-17 | ISO 10844: Comparison of 2014 version against 2011 version

GRB-61-14 | Proposal for amendments to Regulation No. 117 Proposal to update the test-track references to the recently published ISO 10844:2014.

17. The expert from IMMA proposed collective amendments to Regulations Nos. 9, 41 and 63 to introduce the recently published standard ISO 10844:2014 and to align the transition provisions for new type approvals and extension to approvals (ECE/TRANS/WP.29/GRB/2015/5 and GRB-61-13). GRB adopted these proposals, as contained in Annexes VII, VIII and IX to this report, and mandated the secretariat to submit them to WP.29 and AC.1 for consideration and vote at their June 2015 sessions.

GRB-61-13 | Proposal for amendments to UN Regulations Nos. 9, 41, and 63 The purpose of this proposal is to update the reference to the latest version of the ISO 10844 and to introduce transitional provisions for the shift of the test track requirements from ISO 10844: 1994 to ISO 10844: 2014. This proposal supersedes document GRB/2015/5.

GRB/2015/5 | Proposals for amendment to Regulations Nos. 9, 41 and 63 The purpose of this proposal is to update the reference to the latest version of the ISO 10844 and to introduce transitional provisions for the shift of the test track requirements from ISO 10844: 1994 to ISO 10844: 2014.

18. The expert from the Netherlands recalled the two studies presented at the previous session of GRB and introduced further arguments for tightening tyre noise limits in Regulation No. 117, together with the text of draft amendments (GRB-61-03 and Add.1). The expert from ETRTO questioned if the pool of tyres selected for the Dutch studies had indeed been a representative sample (GRB-61-18). He further pointed out that, for the time being, the tyre industry was busy meeting the requirements of 02 series of amendments to Regulation No. 117 which had recently come into force, in November 2012. According to him, until the completion of this process by 2018-2020, it would be premature to consider further reducing of tyre noise limits. The experts from China, Norway and Switzerland agreed that the proposal by the Netherlands needed further study. The experts from France and Germany pointed out various problems with labelling of tyres. GRB invited experts to provide their comments on the Dutch proposal and decided to revert to this issue at the next session on the basis of a new informal document containing the draft amendment proposals tabled by the expert from the Netherlands in GRB-61-03.

GRB-61-03 | Possible future tyre noise limits Presentation of the benefits envisioned by the Netherlands from the use of AAA tyres.

GRB-61-03/Add.1 | Possible future tyre noise limits (presentation)

GRB-61-18 | ETRTO comments on GRB-60-08, GRB-60-12, GRB-60-14-Rev.1 and GRB-61-03

19. The expert from the Russian Federation presented historical developments of health standards and regulations on internal noise in the former Soviet Union and the Russian Federation (GRB-61-17). He also informed GRB that, as from 1 January 2015, a new regional regulation had come into force in the Customs Union establishing obligatory values for internal noise. He further clarified that his presentation was only for information purposes and that any concrete proposals could only be submitted to GRB when standard ISO-5128 on measuring internal noise, dated back to 1980, would be updated. The expert from ISO reported on ISO activities in this respect. The Chair proposed to keep this issue in the agenda and, as a first step, to consider if the methods for measuring inside noise in the Consolidated Resolution on the Construction of Vehicles (R.E.3) should be updated.

GRB-61-17 | Draft interstate standard on internal noise Update on Russian developments and perspectives regarding the regulation of vehicle interior noise levels.

20. The expert from the Netherlands presented a discussion paper (GRB-61-01 and Add.1) exploring the possibility of introducing a noise label system for vehicles and providing an initial model for such labelling. In particular, he suggested that a labelling system for private cars rely on scores for interior noise, powertrain noise (engine and exhaust system), and tyre noise. The experts from Austria, France, Germany and OICA raised practical questions regarding the potential advantages of such a labelling system for customers. The expert from the European Commission pointed out that labelling falls under the competence of the Community and that the EU internal procedures should be followed. GRB decided to come back to this issue at the next session.

GRB-61-01 | A noise label for motor vehicles: towards quieter traffic

GRB-61-01/Add.1 | A noise label for motor vehicles: towards quieter traffic (presentation)

21. The expert from CEDR presented the experiences of his organization and its members regarding the use of noise reducing pavements (GRB-61-16). Such pavements were found to be more cost-effective than noise barriers and to reduce noise levels with 2 to 3 dB (max. 6 dB). On the other hand, the lifetime of noise reducing pavements is less than the one of non-noise reducing pavements and the investment costs of noise reducing pavements is higher than the costs of non-noise reducing pavements.

22. GRB noted that three factors contribute to the overall noise production: vehicles, tyres and road surfaces. Thus, a holistic approach should be followed to reduce sound emissions. The Chair recalled that, at present, UN Regulations do not address the issue of road surfaces and that GRB has no mandate for regulating pavements. GRB agreed to continue this discussion at its next session and looked forward to new studies and presentations on the issue.

GRB-61-16 | Traffic noise and motorway pavements

23. The expert of WBU presented a position paper (GRB-61-15) with concerns about an Audible Vehicle Alert System (AVAS) of Quiet Road Transport Vehicles (QRTV). He stressed that AVAS must fulfil four criteria, namely presence, direction, location and operation of a hybrid electric or electric vehicle. He further explained that the AVAS sound must be detectable and locatable, AVAS must be on while the vehicle is stationary and that the driver should not be able to switch off (or pause) AVAS.

GRB-61-15 | WBU statement on the proposed quiet road transport vehicles regulations

24. The experts from France and Germany, co-chairing IWG QRTV for a UN Regulation, briefed GRB on the progress in preparing a draft UN Regulation on QRTV under the 1958 Agreement and on its key aspects (GRB-61-02, GRB-61-10). GRB noted that a draft Regulation would be officially submitted to the next session of GRB in September 2015, as foreseen by the IWG mandate. The Chair invited GRB experts to provide IWG with their comments on a draft QRTV regulation as soon as possible and/or to take part in the work of IWG.

25. GRB confirmed that, for the time being, a new QRTV Regulation would cover electric and hybrid electric vehicles of categories M and N only. GRB agreed that stationary noise and the pause-switch function would be optional in stage 1. GRB also agreed that a maximum AVAS sound level should be introduced into a QRTV Regulation, with a view to protecting environment. The expert of WBU concurred with this view.

GRB-61-02 | Draft UN Regulation concerning the approval of Quiet Road Transport Vehicles Draft proposal for minimum sound requirements (via an audible alerting signal) for low noise vehicles (e.g., electric vehicles).

GRB-61-10 | Presentation on the draft UN Regulation concerning the audibility of quiet road transport vehicles

26. The Chair recalled that IWG QRTV for a UN Regulation should be working in close cooperation with IWG QRTV for GTR. He also pointed out that IWG QRTV for GTR would ask WP.29 to extend its mandate for one year.

27. GRB noted that, in line with the WP.29 decision, the secretariat was preparing a concept of a central register in which acronyms used by WP.29 as well as definitions used in UN Regulations and UN GTRs would be listed. In this context, GRB reiterated its request to OICA and IMMA to update documents GRB-57-12 and GRB-57-18 containing definitions and acronyms in Regulations under the responsibility of GRB.

GRB-57-12 | UN Regulation No. 63: Acronyms and Abbreviations IMMA contribution towards the World Forum project to codify and harmonize technical terms and abbreviations used across its regulations.

GRB-57-18 | Proposal for a list of Acronyms and Abbreviations to Regulation No. 51 List of acronyms and abbreviations contained in Regulation No. 51 prepared by the International Organization of Motor Vehicle Manufacturers (OICA).

28. GRB was informed that the Working Party on Lighting and Light-Signalling (GRE) had approved draft definitions for agricultural trailers and towed machinery, to be included into the Consolidated Resolution on the Construction of Vehicles (R.E.3) (ECE/TRANS/WP.29/2015/35). GRB invited experts to transmit their comments and suggestions, if any, to the secretariat.

WP.29/2015/35 | Proposal for draft amendments to the Consolidated Resolution on the Construction of Vehicle (R.E.3) Proposal as approved by the GRE and GRSG to add classifications covering agricultural trailers and towed agricultural machinery in the Consolidated Resolution on the Construction of Vehicles (R.E.3).

29. The secretariat informed GRB about the current situation in Revision 3 of the 1958 Agreement, development of IVWTA and the Database on Exchange of Type Approval documentation (DETA) and highlighted the recent changes in the draft text of Revision 3 made at the November 2014 session of WP.29 as well as the remaining outstanding issues (ECE/TRANS/WP.29/2014/53, ECE/TRANS/WP.29/2014/82). GRB requested the secretariat to deliver, at its next session, a detailed presentation on Revision 3 of the 1958 Agreement. The Chair pointed out that Regulations Nos. 28, 51 and 117 under the responsibility of GRB had been recently amended and are ready for the inclusion in the IVWTA listing.

WP.29/2014/53 | Proposal for Revision 3 of the 1958 Agreement Final proposed text to revise and update the 1958 Agreement pursuant to the project to establish an international whole vehicle type approval system.

WP.29/2014/82 | Proposal for amendments to draft Revision 3 to the 1958 Agreement Addition of an article to the agreement stating its preparation in English, French, and Russian with all three languages carrying the same legal power.

30. The secretariat reported on the highlights of the 164th session of WP.29 (ECE/TRANS/WP.29/1112, GRB-61-04).

GRB-61-04 | General information and WP.29 highlights for the 61st GRB session

31. Following the adoption of major amendments to several Regulations, GRB resumed its exchange of views on issues that should be included in the future work. The expert from France was of the view that GRB would be occupied with updating Regulation No. 28 (see para. 5 above). The expert from Germany pointed out that backing alarms for QRTV could cause problems at night and volunteered to prepare an informal document on this issue for the next session.

32. GRB was informed that Mr. Pieter Steenackers (CLEPA) would no longer attend its sessions. GRB thanked him for his contributions and wished him success in his new career.

33. The secretariat reported on best practices for using private standards in Regulations managed by WP.29 (WP.29-164-26).

WP.29-164-26 | Use of private standards in Regulations managed by WP.29 - Best practices

34. The expert from IMMA informed GRB of his intention to submit, to the next session, proposals for amendments to Regulation No. 41 for hybrid vehicles. He invited GRB experts to provide comments, if any, before the next session.

35. For its sixty-second session, scheduled to be held in Geneva from 1 (starting at 2.30 p.m.) to 3 (concluding at 5.30 p.m.) September 2015, GRB noted that the deadline for the submission of official documents to the secretariat was 5 June 2015, twelve weeks prior to the session. The following provisional agenda was adopted:
1. Adoption of the agenda.
2. Regulation No. 28 (Audible warning devices).
3. Regulation No. 41 (Noise of motorcycles): Development.
4. Regulation No. 51 (Noise of M and N categories of vehicles):
(a) Development;
(b) Additional sound emission provisions.
5. Regulation No. 59 (Replacement silencing systems).
6. Regulation No. 92 (Replacement exhaust silencing systems for motorcycles).
7. Regulation No. 117 (Tyre rolling noise and wet grip adhesion).