1. The Working Party on Passive Safety (GRSP) held its seventy-fifth session from 27 to 31 May 2024 in Geneva. Chaired by Mr. M. Koubek (United States of America), experts from the following countries participated following Rule 1(a) of the Rules of Procedure of the World Forum for Harmonization of Vehicle Regulations (WP.29) (ECE/TRANS/WP.29/690/Rev.2): Australia, Austria, Canada, China, Finland, France, Germany, India, Italy, Japan, Kingdom of the Netherlands, Poland, Republic of Korea, Russian Federation, Spain, Sweden, Switzerland, United Kingdom of Great Britain and Northern Ireland, United States of America. The European Commission (EC) participated. Experts from the following non-governmental organizations participated: Consumers International (CI), European Association of Automotive Suppliers (CLEPA), International Association of the Body and Trailer Building Industry (CLCCR) and International Organization of Motor Vehicle Manufacturers (OICA).

2. Annex I to the session report lists the informal documents of the session.

3. GRSP considered and adopted the agenda (ECE/TRANS/WP.29/GRSP/2024/1), the running order (GRSP-75-02-Rev.1) and the annotations (GRSP-75-09). GRSP informal working groups are listed in annex X to the session report.

GRSP-75-02/Rev.1 | GRSP: Running order of the 75th (May 2024) session

GRSP-75-09 | GRSP: Updated annotated provisional agenda for the 75th (May 2024) session

GRSP/2024/1 | GRSP: Annotated provisional agenda for the 75th (May 2024) session

4. GRSP noted that the Executive Committee of the 1998 Agreement (AC.3) at its March 2024 session had adopted the authorization (ECE/TRANS/WP.29/2024/32) to develop amendments to UN GTRs Nos. 6 (Safety Glazing), 7 (Head Restraints) and 14 (Pole side impact) which would allow the transfer of the reference, drawings and specification on the three-dimensional H- (3-D H-) point machine and calibration procedure from the UN GTRs to Mutual Resolution No. 1 (M.R.1). The expert from the Kingdom of the Netherlands, which sponsors the amendment, introduced ECE/TRANS/WP.29/GRSP/2024/8 amending the UN GTR and the final report of the amendment work (GRSP-75-20-Rev.1). Finally, GRSP recommended ECE/TRANS/WP.29/GRSP/2024/8, not amended, as Amendment 2 to UN GTR No. 7 and its final report GRSP-75-20-Rev.1 (as reproduced in annex II to this report) to the November 2024 session of AC.3.

GRSP-75-20/Rev.1 | Report on development of Amendment 4 to GTR 6, Amendment 2 to GTR 7, and Amendment 1 to GTR 14 Technical appendices supporting amendments to the three dimensional (3-D) "H" point machine test tool provisions and their harmonisation under Mutual Resolution 1.

GRSP/2024/8 | GTR 7: Proposal for Amendment 2 Proposal to update references to the three-dimensional "H" point measurement and calibration procedure pursuant to the transposition of these provisions into Mutual Resolution No. 1.

WP.29/2024/32 | GTR 6, 7, and 14: Request for authorization to amend Request for authorization to develop amendments to remove references to the three-Dimensional "H"-point machine and to move its drawings and specifications to Mutual Resolution No. 1.

5. New information was not provided.

6. As per paragraph 4, the expert from the Kingdom of the Netherlands, which sponsors the amendment, introduced ECE/TRANS/WP.29/GRSP/2024/9 amending the UN GTR and the final report of the amendment work (GRSP-75-20-Rev.1). GRSP recommended ECE/TRANS/WP.29/GRSP/2024/9, not amended, as Amendment 1 to UN GTR No. 14 and its final report GRSP-75-20-Rev.1 to the November 2024 session of AC.3.

GRSP-75-20/Rev.1 | Report on development of Amendment 4 to GTR 6, Amendment 2 to GTR 7, and Amendment 1 to GTR 14 Technical appendices supporting amendments to the three dimensional (3-D) "H" point machine test tool provisions and their harmonisation under Mutual Resolution 1.

GRSP/2024/9 | GTR 14: Proposal for Amendment 1 Proposal to update references to the three-dimensional "H" point measurement and calibration procedure pursuant to the transposition of these provisions into Mutual Resolution No. 1.

7. The Chair of IWG EVS, on behalf of the co-sponsors (China, Japan, United States of America, European Union) and of the members of IWG GTR No. 20, Phase 2, reported that WP.29 and AC.3 at their March 2024 sessions had agreed to extend the IWG mandate until March 2025 (ECE/TRANS/WP.29/1177, paragraphs 52 and 149). The expert from Japan offered to host the next IWG meeting during the first week of September 2024 in his country and requested GRSP experts to contact the IWG Chair.

8. The expert from CLEPA introduced GRSP-75-15 which aligns the UN GTR with the specific text of UN Regulation No. 100 (Electric power trained vehicles), that clarifies specific conditions for a clear interpretation of an AC voltage (rms). The GRSP Chair, who is also the IWG Chair, will inform the IWG of this proposal, but stated that the IWG will prioritize its Thermal Propagation work in the immediate future. The IWG may consider taking this issue up in future phases, provided that a Contracting Party sponsors this issue.

GRSP-75-15 | GTR 20: Proposal for Amendment 1 Proposal to align GTR 20 with UN R100 (Electric power-train vehicles) pursuant to the clarification of specific conditions concerning AC voltage (rms).

9. GRSP agreed to discuss ECE/TRANS/WP.29/GRSP/2023/27 under agenda item 7 (see paragraph 11 below).

GRSP/2023/27 | UN R14: Proposal for the 10 series of amendments Proposal to enhance the safety of the belted passenger seated behind a seat by removing the two of the derogations for two-point belts in buses and coaches laid down in paragraphs 5.3.5. to 5.3.5.4.

10. The expert from Germany informed GRSP (GRSP-75-27) about a workshop held at the Federal Highway Research Institute (BASt) on 25 and 26 April 2024. He noted that the workshop aimed at a verification ECE/TRANS/WP.29/GRSP/2023/28 (introduced by the expert from OICA at the December 2023 session of GRSP), which allows occupants to use alternative seating positions only if this was not in conflict with any other UN Regulation. The expert from CLEPA noted that the workshop had not referred to child restraint systems nor how to secure children. He added that only adult dummies had been considered and questioned the alternative seating positions of children. The expert from Germany confirmed the relevance of children in this issue.. The expert from OICA introduced GRSP-75-13 (superseding ECE/TRANS/WP.29/GRSP/2023/28). The expert from France asked for a detailed justification, stating that reference point “HR” was confusing. GRSP agreed to resume consideration on a revised proposal tabled by the expert from OICA at its December 2024 session. GRSP requested its interested experts to liaise with the expert from OICA on feedback to improve GRSP-75-13.

GRSP-75-13 | UN R14: Proposal for Supplement 10 to the 07, Supplement 02 to the 08, and Supplement 03 to the 09 series of amendments Proposal based on the special ad hoc workshop discussions to add anchorage positions to enable alternative "extended use" seating positions (with a higher seatback inclination than today) during driving.

GRSP-75-27 | Report on the GRSP UN R14 Workshop on Extended Use Positions

GRSP/2023/28 | UN R14: Proposal for Supplement 10 to the 07 Series, Supplement 2 to the 08 Series, and Supplement 3 to the 09 Series of Amendments Proposal to add anchorage positions to enable alternative seating positions (with a higher seatback inclination than today) during driving.

11. GRSP resumed discussion on ECE/TRANS/WP.29/GRSP/2023/29 which complements ECE/TRANS/WP.29/GRSP/2023/27 on safety-belt anchorages and removes derogations for two-point safety-belts on buses and coaches. The expert from Finland, author of the proposals, informed GRSP that he could not provide global statistical data, due to a lack of resources, to justify his proposal as requested by GRSP at its December 2023 session to justify his proposal. The expert from Australia stated that he supported in principle the proposal. However, he added that the lack of worldwide statistical evidence hamper a world view of the situation. The expert from CI that the removal of two-point safety-belts would ease to secure children in buses. The expert from Sweden supported the proposal. The expert from the Russian Federation stated that three-points safety-belts would be better than the two-points safety-belts and proposed to further the benefits through studies. He also proposed to verify the benefits of adjusting the height of effective upper anchorage point to accommodate occupants of different sizes. The expert from Italy argued that the three-points safety-belts could be detrimental. The expert from Germany questioned the effectiveness of the three-points safety-belts in buses. He explained that the majority of injuries in buses were from flying objects or due to ejection outside of the occupant compartment during crashes. The expert from France informed GRSP that three-points safety-belts reduce injuries in the event of frontal impacts. However, he added that 50 per cent of accidents in buses were caused by roll over and in these cases three-points safety-belts would cause neck injuries. Finally, GRSP agreed to resume discussion on this topic waiting statistical studies voluntarily provided by the expert from France and Sweden.

GRSP/2023/27 | UN R14: Proposal for the 10 series of amendments Proposal to enhance the safety of the belted passenger seated behind a seat by removing the two of the derogations for two-point belts in buses and coaches laid down in paragraphs 5.3.5. to 5.3.5.4.

GRSP/2023/29 | UN R16: Proposal for the 10 series of amendments Proposal to enhance the safety of the belted passenger seated behind a seat by removing two derogations for buses and coaches for two-point belts.

12. GRSP resumed discussion on three proposals prepared by the experts of the ad hoc group to split UN Regulation No. 16 into three UN Regulations: (a) adult safety-belts and restraint systems (ECE/TRANS/WP.29/GRSP/2024/4 amended by GRSP-75-25-Rev.1), (b) vehicle type approval with regard to safety-belts and child restraint systems installation (ECE/TRANS/WP.29/GRSP/2024/5 amended by GRSP-75-23-Rev.1) and (c) safety-belt reminders (ECE/TRANS/WP.29/GRSP/2024/3 amended by GRSP-75-24). GRSP adopted the proposals and requested the secretariat to submit them for consideration and vote at the November 2024 sessions of WP.29 and of the Administrative Committee of the 1958 Agreement (AC.1) as:

1. Proposal for the 10 Series of Amendments to UN Regulation No. 16 (Safety-belts)(ECE/TRANS/WP.29/GRSP/2024/4 as amended by annex III to the session report);
2. Proposal for a New UN Regulation on the Installation of safety-belts, restraint systems, child restraint systems, ISOFIX child restraint systems and i-Size child restraint systems (ECE/TRANS/WP.29/GRSP/2024/5 as amended by annex III to the session report); and
3. Proposal for a New UN Regulation on Safety-Belt Reminders (ECE/TRANS/WP.29/GRSP/2024/3 as amended by annex III to the session report).

GRSP-75-23/Rev.1 | Proposal for a New UN Regulation on the Installation of safety-belts, restraint systems, child restraint systems, ISOFIX child restraint systems and i-Size child restraint systems

GRSP-75-24 | Safety-belt reminders: Proposal for a new UN Regulation Proposal for a new regulation on "Uniform Provisions Concerning the Approval of a Vehicle with regard to Safety-Belt Reminders".

GRSP-75-25/Rev.1 | UN R16: Proposal for a 10 series of amendments Revised proposal based on document GRSP/2024/4 to amend UN R16 pursuant to proposal by the Ad Hoc Group on splitting UN R16 into three UN Regulations, separating safety-belt components and restraint systems from safety-belt installation requirements and safety-belt reminders.

GRSP/2024/3 | Proposal for a New UN Regulation on Safety-Belt Reminders

GRSP/2024/4 | UN R16: Proposal for a 10 series of amendments Proposal by the Ad Hoc Group on splitting UN Regulation No. 16 into three UN Regulations, separating safety-belt components and restraint systems from safety-belt installation requirements and safety-belt reminders.

GRSP/2024/5 | Proposal for a new UN Regulation on the Installation of safety belts, restraint systems, child restraint systems, ISOFIX child restraint systems and i-Size child restraint systems Proposal by the Ad hoc Group to split UN Regulation No. 16 into three UN Regulations, separating safety-belt components and restraint systems from safety-belt installation requirements and safety-belt reminders.

13. The expert from the Republic of Korea, Chair of the ad-hoc group on seat-belt reminders (SBR), introduced GRSP-75-12 to explain that were different interpretations to be solved on SBR activation when the safety-belts was unfastened. The expert from Spain argued that current provisions in the UN Regulation need changes. Furthermore, the expert from the Republic of Korea introduced ECE/TRANS/WP.29/GRSP/2024/2 to clarify the text of the UN Regulation. GRSP also noted ECE/TRANS/WP.29/GRSP/2024/6, tabled by the expert from Germany to clarify the buckle-opening test. GRSP endorsed in principle this last proposal. GRSP finally agreed to resume consideration on ECE/TRANS/WP.29/GRSP/2024/2, ECE/TRANS/WP.29/GRSP/2024/6 and ECE/TRANS/WP.29/GRSP/2023/32 (see ECE/TRANS/WP.29/GRSP/74, paragraph 19) at the December 2024 session of GRSP. The experts from Germany, Japan and the Republic of Korea were requested to adapt their respective proposals to the new adopted UN Regulations and to the 10 series of amendments to UN Regulation No. 16 (see paragraph 12 above).

GRSP-75-12 | Safety-belt reminder: 2nd level warning interpretation

GRSP/2023/32 | UN R16: Proposal for a 10 series of amendments Proposal n to limit slack of the safety-belt buckle in rear seats to improve occupant safety.

GRSP/2024/2 | UN R16: Proposal for the 11 series of amendments Proposal from the ad hoc group on safety-belt reminders to clarify: (a) exemption of the presence of SBR on folding seats, (b) first level of warning tests with transmission in neutral position, and <notextile>(c)</notextile> interference of devices for remote starting of vehicles with SBR.

GRSP/2024/6 | UN R16: Proposal for Supplement 1 to the [10] series of amendments Proposal to clarify how to perform the buckle-opening test under paragraph 7.8. of the text.

14. The expert from the Kingdom of the Netherlands withdrew ECE/TRANS/WP.29/2023/115. GRSP agreed to defer discussion on ECE/TRANS/WP.29/GRSP/2024/15 at its December 2024 session. GRSP also agreed to send GRSP-75-30 (introduced by GRSP-75-28), tabled by the expert from CLEPA, to the IWG on equitable protection of occupants (EqOP) IWG.

GRSP-75-28 | UN R17: Response to proposals in document GRSP/2024/15

GRSP-75-30 | UN R17: Proposal for Supplement 1 to the 11 series of amendments Proposal to improve the whiplash behaviour of occupants of smaller stature and in particular of female drivers.

GRSP/2024/15 | UN R17: Proposal for a 12 series of amendments Proposal from the Informal Working Group on Equitable Occupant Protection (IWG-EqOP) to introduce additional test points for the test procedure evaluating the performance of the head restraint.

WP.29/2023/115 | UN R17: Proposal for Supplement 1 to the 10 series of amendments Proposal to enable approval of all vehicles and seating positions with regard to the strength of seats and their anchorages and with regard to their head restraints (in addition to M₁ and N₁) under UN R17. <i>(Note: WP.29 deferred a decision on adoption of this proposal during the November 2023 session.)</i>

WP.29/2023/115/Corr.1 | UN R17: Correction to document WP.29/2023/115 (Supplement 1 to the 10 series)

15. New information was not provided.

16. New information was not provided.