ETRTO proposal for the replacement of the current Standard Reference Test Tyre as it is being phased out as production will stop mid of 2020. Snow performance test in R117 currently requires SRTT14 as a reference tyre. SRTT14 needs to be replaced and test procedure amended.

18. The expert from ETRTO reported that, in 2020-2021, the American Society for Testing and Materials (ASTM) would be phasing out the Standard Reference Test Tyre SRTT14 (ASTM E1136) which was referenced in UN Regulations Nos. 108 and 117 (GRBP-71-06). Therefore, these references would need to be replaced by SRTT16 (ASTM F2493) tyre, and the test procedure should be amended accordingly. The Chair invited ETRTO to submit an official document with draft amendments to UN Regulation No. 117 for consideration at the next session. The expert from BIPAVER volunteered to cooperate with ETRTO with the aim to prepare similar amendments to UN Regulation No. 108.

ETRTO report on the study on the Dimensional Requirements for tyres with radial or run flat structure after having performed the load speed endurance test. ETRTO proposes to amend the UN Regulations No 30, 54 [and 75] by removing the requirements for tyres with radial and run flat structure.

12. The expert from ETRTO introduced a new Supplement to UN Regulation No. 30 and an accompanying transitional provision (paragraph 11.4.) that would delay for three months the mandatory application of the Supplement (ECE/TRANS/WP.29/GRBP/2020/3). In particular, he proposed excluding tyres with radial and run flat structure from the dimensional requirements after the load speed endurance test (GRBP-71-07). Various experts commented on the proposal and suggested modifications (GRBP-71-30). Finally, GRBP adopted the proposal, as contained in Annex VI, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2020 sessions as Supplement 22 to the 02 series of amendments to UN Regulation No. 30.

13. GRBP noted that the adopted transitional provision 11.4. does not contradict the WP.29 Guidelines for regulatory procedures and transitional provisions in UN Regulations (ECE/TRANS/WP.29/1044/Rev.2). At the same time, several GRBP experts expressed concerns about the rationale given by ETRTO for this provision which was the delays in issuance by the United Nations Office for Legal Affairs (OLA) of depository notifications about the entry into force of amendments to UN Regulations. GRBP was of the view that this is a general problem that affects all UN Regulations and other WP.29 Working Parties as well. Therefore, GRBP requested the Chair to raise this issue at the next session of the Administrative Committee for Coordination of Work (AC.2).

ETRTO proposal for amending tyre marking method by the removal of the use of wording “moulded” in the marking clause as this is only one of the various technical solutions currently available.

14. The expert from ETRTO proposed amending the tyre marking method in the UN Regulations (GRBP-71-08). Following a brief discussion, the Chair invited ETRTO to submit an official document to the next session.

The text submitted by the experts from the European Tyre and Rim Technical Organisation (ETRTO) to amend the Japanese proposal for a Supplement to the 02 series of amendments (ECE/TRANS/WP.29/GRBP/2020/6)

21. The expert from Japan introduced an amendment which addressed unique light trucks available on the Japanese market (ECE/TRANS/WP.29/GRVA/2020/6). The expert of ETRTO proposed a slight modification (GRBP-71-29). GRBP adopted the proposal, as contained in Annex VII, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2020 sessions Supplement 12 to the 02 series of amendments to UN Regulation No. 117.

Changes to the proposal to align definitions across tyre regulations and align the regulations with technological progress, correct an editorial error, and clarify that the ply rating is not applicable to T-type temporary use tyres.

12. The expert from ETRTO introduced a new Supplement to UN Regulation No. 30 and an accompanying transitional provision (paragraph 11.4.) that would delay for three months the mandatory application of the Supplement (ECE/TRANS/WP.29/GRBP/2020/3). In particular, he proposed excluding tyres with radial and run flat structure from the dimensional requirements after the load speed endurance test (GRBP-71-07). Various experts commented on the proposal and suggested modifications (GRBP-71-30). Finally, GRBP adopted the proposal, as contained in Annex VI, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2020 sessions as Supplement 22 to the 02 series of amendments to UN Regulation No. 30.

13. GRBP noted that the adopted transitional provision 11.4. does not contradict the WP.29 Guidelines for regulatory procedures and transitional provisions in UN Regulations (ECE/TRANS/WP.29/1044/Rev.2). At the same time, several GRBP experts expressed concerns about the rationale given by ETRTO for this provision which was the delays in issuance by the United Nations Office for Legal Affairs (OLA) of depository notifications about the entry into force of amendments to UN Regulations. GRBP was of the view that this is a general problem that affects all UN Regulations and other WP.29 Working Parties as well. Therefore, GRBP requested the Chair to raise this issue at the next session of the Administrative Committee for Coordination of Work (AC.2).

Tyre Industry preliminary worn tyre definition proposal with an updated proposal for the tyre buffing method.

10. The expert from the European Tyre and Rim Technical Organization (ETRTO) introduced a proposal for amendments that allows for tyre marking methods other than moulding (ECE/TRANS/WP.29/GRBP/2020/12). GRBP adopted the proposal and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 23 to the 02 series of amendments to UN Regulation No. 30.

13. GRBP considered a proposal for amendments that had been submitted by the expert from ETRTO (ECE/TRANS/WP.29/GRBP/2020/13, GRBP-72-27 and GRBP-72-30). GRBP adopted the proposal, as amended by Annex V of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 24 to the original series of amendments to UN Regulation No. 54.

14. The expert from ETRTO proposed several modifications (ECE/TRANS/WP.29/GRBP/2020/14, GRBP-71-07-Rev.1 and GRBP-72-28). GRBP adopted the proposal, as amended by Annex VI of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 19 to the original series of amendments to UN Regulation No. 75.

Proposal for alternative language regarding markings to avoid use of the term “moulded” which could be interpreted as a technical design restriction.

15. GRBP considered a proposal for amendments that had been submitted by the expert from ETRTO (ECE/TRANS/WP.29/GRBP/2020/15 and GRBP-72-08). GRBP adopted the proposal, as amended by Annex VII of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 19 to the original series of amendments to UN Regulation No. 106.

16. The expert from ETRTO introduced an amendment proposal with the aim to improve the reproducibility of the test method from standard ISO 23671 (ECE/TRANS/WP.29/GRBP/2020/16). Following concerns of the experts from Germany and Spain about paragraph 4.1.2.1. of Annex 5, part A, the expert from ETRTO proposed a modification to this paragraph (GRBP-72-29). GRBP adopted the proposal, as amended by Annex VIII of the session report, and requested the secretariat to submit it to WP.29 for consideration and vote at their March 2021 sessions as a draft Supplement 13 to the 02 series of amendments to UN Regulation No. 117.

17. The expert from ETRTO proposed further amendments with a view to modifying the word “moulded” in tyre marking methods and replacing the Standard Reference Test Tyre SRTT14 by SRTT16 (ECE/TRANS/WP.29/GRBP/2020/17). GRBP adopted the proposal, subject to deletion of paragraph 9.1., and requested the secretariat to submit it to WP.29 and for consideration and vote at their March 2021 sessions as part of draft Supplement 13 to the 02 series of amendments to UN Regulation No. 117.

16. The expert from ETRTO introduced an amendment proposal with the aim to improve the reproducibility of the test method from standard ISO 23671 (ECE/TRANS/WP.29/GRBP/2020/16). Following concerns of the experts from Germany and Spain about paragraph 4.1.2.1. of Annex 5, part A, the expert from ETRTO proposed a modification to this paragraph (GRBP-72-29). GRBP adopted the proposal, as amended by Annex VIII of the session report, and requested the secretariat to submit it to WP.29 for consideration and vote at their March 2021 sessions as a draft Supplement 13 to the 02 series of amendments to UN Regulation No. 117.

17. The expert from ETRTO proposed further amendments with a view to modifying the word “moulded” in tyre marking methods and replacing the Standard Reference Test Tyre SRTT14 by SRTT16 (ECE/TRANS/WP.29/GRBP/2020/17). GRBP adopted the proposal, subject to deletion of paragraph 9.1., and requested the secretariat to submit it to WP.29 and for consideration and vote at their March 2021 sessions as part of draft Supplement 13 to the 02 series of amendments to UN Regulation No. 117.

12. The expert from ETRTO recalled the recent adoption of Amendment No. 2 to UN GTR No. 16 (Tyres) and proposed to elaborate a roadmap for transposing of its provisions into appropriate UN Regulations (GRBP-72-07). GRBP thanked ETRTO for the initiative and agreed to revert to this issue at the next session.

15. GRBP considered a proposal for amendments that had been submitted by the expert from ETRTO (ECE/TRANS/WP.29/GRBP/2020/15 and GRBP-72-08). GRBP adopted the proposal, as amended by Annex VII of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 19 to the original series of amendments to UN Regulation No. 106.

14. The expert from ETRTO proposed several modifications (ECE/TRANS/WP.29/GRBP/2020/14, GRBP-71-07-Rev.1 and GRBP-72-28). GRBP adopted the proposal, as amended by Annex VI of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 19 to the original series of amendments to UN Regulation No. 75.

18. On behalf of IWG for Wet Grip on Worn Tyres (WGWT), the expert of ETRTO reported on their progress (GRBP-72-06) and introduced amendments to the IWG Terms of Reference (ECE/TRANS/WP.29/GRBP/2020/11). The expert of EC proposed to extend the IWG scope to C2 and C3 tyres (GRBP-72-02). The expert from ETRTO commented on this proposal (GRBP-72-26-Rev.1). Following a discussion, GRBP was not in a position to reach a consensus on the EC proposal and decided to come back to revision of ToR at the next session. Meanwhile, GRBP agreed to request WP.29 to extend the mandate of IWG WGWT until September 2021.

13. GRBP considered a proposal for amendments that had been submitted by the expert from ETRTO (ECE/TRANS/WP.29/GRBP/2020/13, GRBP-72-27 and GRBP-72-30). GRBP adopted the proposal, as amended by Annex V of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 24 to the original series of amendments to UN Regulation No. 54.

14. The expert from ETRTO proposed several modifications (ECE/TRANS/WP.29/GRBP/2020/14, GRBP-71-07-Rev.1 and GRBP-72-28). GRBP adopted the proposal, as amended by Annex VI of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 19 to the original series of amendments to UN Regulation No. 75.

16. The expert from ETRTO introduced an amendment proposal with the aim to improve the reproducibility of the test method from standard ISO 23671 (ECE/TRANS/WP.29/GRBP/2020/16). Following concerns of the experts from Germany and Spain about paragraph 4.1.2.1. of Annex 5, part A, the expert from ETRTO proposed a modification to this paragraph (GRBP-72-29). GRBP adopted the proposal, as amended by Annex VIII of the session report, and requested the secretariat to submit it to WP.29 for consideration and vote at their March 2021 sessions as a draft Supplement 13 to the 02 series of amendments to UN Regulation No. 117.

17. The expert from ETRTO proposed further amendments with a view to modifying the word “moulded” in tyre marking methods and replacing the Standard Reference Test Tyre SRTT14 by SRTT16 (ECE/TRANS/WP.29/GRBP/2020/17). GRBP adopted the proposal, subject to deletion of paragraph 9.1., and requested the secretariat to submit it to WP.29 and for consideration and vote at their March 2021 sessions as part of draft Supplement 13 to the 02 series of amendments to UN Regulation No. 117.

13. GRBP considered a proposal for amendments that had been submitted by the expert from ETRTO (ECE/TRANS/WP.29/GRBP/2020/13, GRBP-72-27 and GRBP-72-30). GRBP adopted the proposal, as amended by Annex V of the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their March 2021 sessions as a draft Supplement 24 to the original series of amendments to UN Regulation No. 54.

Proposal to amend the extended mobility tyre (EMT) symbol following the detection of dimensional inconsistencies within the International Organization for Standardization Working Group (ISO) TC31/SC3/WG19, where the dimension “0,33h” was judged wrong and constituting an unnecessary over constraint and to amend the inflation value to be used for the tyre conditioning when assessing the “flat tyre running mode” of “run flat tyres” and of “extended mobility tyres”.

10. The expert from ETRTO introduced ECE/TRANS/WP.29/GRBP/2021/4. GRBP adopted the proposal and requested the secretariat to submit it for consideration and vote at the June 2021 sessions of WP.29 and AC.1 as a draft Supplement to the 02 series of amendments to UN Regulation No. 30.