WP.29/2026/52
UN R127: Proposal for a Supplement 5 to the 03 series of amendments
Source(s)
Date
31 Mar 2026 (Posted: 10 Mar 2026)
Status
Formal WP.29 review
Subject
Impact
03 series of amendments | Supplement 5
Meeting(s)

Proposal to modify requirements for headform acceleration derivation, windscreen testing, and approval marks. The document proposes notification procedures for Contracting Parties to share test results via the DETA database, deletes paragraphs 11.1 to 11.4, extends transition periods for atypical windscreen fracture behaviour testing until 1 September 2033 and WAD 2,100 boundary provisions until 1 September 2028, and adjusts bonnet top impact torque specifications from 675 Nm ±25 Nm to between 650 Nm and 850 Nm.

UNECE server
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.