45. As per paragraph 4, the experts from Austria and the Republic of Korea, on behalf of IWG, explained that validation of a reference of Human Body Models (HBM) was relevant for the evaluation of HIT (GRSP-73-03). She noted that validation consisted of simulations of HBM against a model representing a GVM frontend. She clarified that the procedure of validation of HBM was limited to pedestrian HIT. GRSP noted that two proposals of addendum to the Mutual Resolution No.1 (M.R.1) were submitted by the IWG to calculate HIT: (a) Addendum 5 on provisions for the DPPS GVM (ECE/TRANS/WP.29/GRSP/2023/7 as amended by GRSP-73-10-Rev.1); and (b) Addendum 6 on developing HBM qualification corridors (GRSP-73-11). GRSP noted that the development of the two Addenda needed further study and agreed to resume discussion at its December 2023 session.

45. As per paragraph 4, the experts from Austria and the Republic of Korea, on behalf of IWG, explained that validation of a reference of Human Body Models (HBM) was relevant for the evaluation of HIT (GRSP-73-03). She noted that validation consisted of simulations of HBM against a model representing a GVM frontend. She clarified that the procedure of validation of HBM was limited to pedestrian HIT. GRSP noted that two proposals of addendum to the Mutual Resolution No.1 (M.R.1) were submitted by the IWG to calculate HIT: (a) Addendum 5 on provisions for the DPPS GVM (ECE/TRANS/WP.29/GRSP/2023/7 as amended by GRSP-73-10-Rev.1); and (b) Addendum 6 on developing HBM qualification corridors (GRSP-73-11). GRSP noted that the development of the two Addenda needed further study and agreed to resume discussion at its December 2023 session.

45. As per paragraph 4, the experts from Austria and the Republic of Korea, on behalf of IWG, explained that validation of a reference of Human Body Models (HBM) was relevant for the evaluation of HIT (GRSP-73-03). She noted that validation consisted of simulations of HBM against a model representing a GVM frontend. She clarified that the procedure of validation of HBM was limited to pedestrian HIT. GRSP noted that two proposals of addendum to the Mutual Resolution No.1 (M.R.1) were submitted by the IWG to calculate HIT: (a) Addendum 5 on provisions for the DPPS GVM (ECE/TRANS/WP.29/GRSP/2023/7 as amended by GRSP-73-10-Rev.1); and (b) Addendum 6 on developing HBM qualification corridors (GRSP-73-11). GRSP noted that the development of the two Addenda needed further study and agreed to resume discussion at its December 2023 session.

4. The expert from the Republic of Korea, Chair of the Informal Working Group on Deployable Pedestrian Protection Systems (IWG DPPS), introduced the final progress report of the group (GRSP-73-13-Rev.1). He introduced ECE/TRANS/WP.29/2023/6 and GRSP-73-12-Rev.1 as the final proposal for Amendment 3 to the UN GTR. The expert from Austria, on behalf of IWG, explained that the proposal incorporated a numerical test as a prerequisite to the certification test of vehicle bonnets. She noted that GRSP-73-59, explained the numerical simulation concerning the Head Impact Time (HIT), based on Generic Vehicle Models (GVM). GRSP continued discussion on HIT and GVM under agenda item 19 (paragraph 46).

5. GRSP agreed that the final draft of Amendment 3 needed further discussion within IWG. Thus, GRSP agreed to seek endorsement from the Executive Committee of the 1998 Agreement (AC.3) to extend the IWG mandate until May 2024. GRSP agreed to resume discussion at its December 2023 session based on a revised: (a) consolidated text of the amendments (superseding ECE/TRANS/WP.29/2023/6 and GRSP-73-12-Rev.1), (b) final report of IWG DPPS (superseding GRSP-73-13-Rev.1).

5. The expert from the Republic of Korea introduced the progress report (GRSP-72-11) of Informal Working Group on Deployable Pedestrian Protection Systems (IWG DPPS). He informed GRSP that the following issues had been resolved by IWG: (a) detection area definition, (b) numerical simulation for Head Impact Time (HIT) against Wrap Around Distance (WAD) information (linear regression), (c) head test area marking with un-deployed DPPS and (d) overshooting phase (dynamic testing). He added that discussion was ongoing on a new wording in the preamble and a final agreement on HIT. He introduced the text of the proposed amendment to the preamble (GRSP-72-08) and the amendment to the text of the regulation (GRP-72-09 amending ECE/TRANS/WP.29/GRSP/2022/2). Finally, he informed GRSP that the final report of IWG would be submitted to the May 2023 session of GRSP.

6. GRSP agreed to resume discussion on the draft Amendment 3 to UN GTR No. 9 on DPPS at its May 2023 session, based on a consolidated text of the amendments (preamble and text of the regulation combined) and on a final report of IWG on DPPS. GRSP requested its experts to provide feedback on GRSP-72-08 and GRSP-72-09 to the expert from the Republic of Korea before the deadline for submission of official documents (20 February 2023) of its May 2023 session.

5. The expert from the Republic of Korea introduced the progress report (GRSP-72-11) of Informal Working Group on Deployable Pedestrian Protection Systems (IWG DPPS). He informed GRSP that the following issues had been resolved by IWG: (a) detection area definition, (b) numerical simulation for Head Impact Time (HIT) against Wrap Around Distance (WAD) information (linear regression), (c) head test area marking with un-deployed DPPS and (d) overshooting phase (dynamic testing). He added that discussion was ongoing on a new wording in the preamble and a final agreement on HIT. He introduced the text of the proposed amendment to the preamble (GRSP-72-08) and the amendment to the text of the regulation (GRP-72-09 amending ECE/TRANS/WP.29/GRSP/2022/2). Finally, he informed GRSP that the final report of IWG would be submitted to the May 2023 session of GRSP.

6. GRSP agreed to resume discussion on the draft Amendment 3 to UN GTR No. 9 on DPPS at its May 2023 session, based on a consolidated text of the amendments (preamble and text of the regulation combined) and on a final report of IWG on DPPS. GRSP requested its experts to provide feedback on GRSP-72-08 and GRSP-72-09 to the expert from the Republic of Korea before the deadline for submission of official documents (20 February 2023) of its May 2023 session.

5. The expert from the Republic of Korea introduced the progress report (GRSP-72-11) of Informal Working Group on Deployable Pedestrian Protection Systems (IWG DPPS). He informed GRSP that the following issues had been resolved by IWG: (a) detection area definition, (b) numerical simulation for Head Impact Time (HIT) against Wrap Around Distance (WAD) information (linear regression), (c) head test area marking with un-deployed DPPS and (d) overshooting phase (dynamic testing). He added that discussion was ongoing on a new wording in the preamble and a final agreement on HIT. He introduced the text of the proposed amendment to the preamble (GRSP-72-08) and the amendment to the text of the regulation (GRP-72-09 amending ECE/TRANS/WP.29/GRSP/2022/2). Finally, he informed GRSP that the final report of IWG would be submitted to the May 2023 session of GRSP.

6. GRSP agreed to resume discussion on the draft Amendment 3 to UN GTR No. 9 on DPPS at its May 2023 session, based on a consolidated text of the amendments (preamble and text of the regulation combined) and on a final report of IWG on DPPS. GRSP requested its experts to provide feedback on GRSP-72-08 and GRSP-72-09 to the expert from the Republic of Korea before the deadline for submission of official documents (20 February 2023) of its May 2023 session.