29. The expert of ETRTO shared their concerns over the recent evolution of UN Regulation No. 117 which was becoming increasingly complex by regular additions of new requirements, annexes and series of amendments with transitional provisions (GRBP-80-25). To avoid further complexity with the upcoming introduction of tyre abrasion requirements, he proposed several options, including splitting the Regulation into several ones. To consider various options in detail, he argued for the establishment of a Group of Interested Experts (GOIE) with a task to develop a conceptual informal document for consideration and validation at the next session in February 2025, to be followed by a working document in September 2025. GRBP agreed with this proposal. Many experts volunteered to participate in GOIE.