Minutes of the 50th session of TFTA held on 6 July 2026. TFTA approved previous meeting minutes and agenda. The SWG Secretary updated on workplan 2026 organizational matters. ETRTO reported two best practice sessions on open road convoy method on 26 June and 3 July, with JATMA organizing a drum method session on 7 July. JASIC provided comments on the UTAC timeline Gantt; TFTA agreed to simplify subject lines 13-15, keep the February 2027 timeline with a review note after summer 2026, and retain line 24 with an indicative note. Action items assigned include preparing a revised Gantt and contacting test facilities on tread depth measurements. Discussion covered C1 mileage potential metric development, C2 test method status and equivalence framework for C2 tyres, and C3 test method development with a brainstorming workshop planned for 8-9 October in hybrid format. TFTA agreed to prepare Supplement 1 to UN Regulation No. 186 with submission deadline week of 9 November 2026.