WP.29/2026/53
UN R127: Proposal for a Supplement 4 to the 04 series of amendments

Proposal to extend application of UN R127 to vehicles of category X and those without drivers or manual driving controls, modify scope provisions, update headform acceleration criteria in paragraph 2.48, add new approval mark provisions distinguishing WAD 2,100 versus WAD 2,500 boundaries, require mandatory notification and uploading of test results to the DETA database, and set transitional provisions with dates through 2033 for type approvals and acceptance of previous amendments.

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Excerpts from session reports
GRSP | Session 78 | 1-4 Dec 2025

28. The expert from the Kingdom of the Netherlands introduced working documents ECE/TRANS/WP.29/GRSP/2025/28 and GRSP/2025/29 with proposals addressing the issue of atypical windscreen fracture. The experts from Italy and Sweden supported the proposals and indicated that the square brackets could be removed. On a question from the expert from Japan regarding the potential need to create a task force, the expert from the Kingdom of the Netherlands suggested that this would be appropriate in two or three years, once enough data had been collected. GRSP adopted ECE/TRANS/WP.29/GRSP/2025/28 and GRSP/2025/29 (removing the square brackets) and requested the secretariat to submit them as proposals for supplement 4 to the 03 series of amendments and supplement 3 to the 04 series of amendments to UN Regulation No. 127 to the June 2026 sessions of WP.29 and AC.1.

30. The expert from Germany introduced ECE/TRANS/WP.29/GRSP/2025/40 and ECE/TRANS/WP.29/GRSP/2025/39 (agenda item 24 (h)) with proposals to change the torque values of the upper legform impactor to avoid damaging it during tests. GRSP adopted ECE/TRANS/WP.29/GRSP/2025/40 and requested the secretariat to submit it as proposals for supplement 2 to the original version, supplement 1 to the 01 series of amendments, supplement 1 to the 02 series of amendments, supplement 4 to the 03 series of amendments and supplement 3 to the 04 series of amendments to UN Regulation No. 127 to the June 2026 sessions of WP.29 and AC.1. It also adopted ECE/TRANS/WP.29/GRSP/2025/39 and requested the secretariat to submit it as a proposal for a corrigendum to UN GTR No. 9 to the June 2026 sessions of WP.29 and AC.3.