22. GRSP discussed the issue of atypical windscreen fracture based on ECE/TRANS/WP.29/GRSP/2025/2 and informal documents GRSP-77-38, GRSP-77-52 and GRSP-77-53. The expert from CLEPA argued that it was always possible that some windscreens would be tougher, resulting in anomalies or outliers and that the pre-test process which had been originally devised was therefore not viable. GRSP supported the approach taken in informal document GRSP-77-38, to collect data through the Database for the Exchange of Type Approval documentation (DETA). Prompted by a question from the expert from France, the expert from the Kingdom of the Netherlands preliminarily suggested a 5-year period of data collection. He informed GRSP that he would bring a working document to the next session taking into account the feedback received.

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.