Standard: Addressing leakage in mechanism methodologies (v.02.0) Open English PDF 0.17 MB Symbol A6.4-STAN-METH-005 Publication date 09 Oct 2026 Document type Standard Author UNFCCC. Article 6.4 Supervisory Body Topic Mitigation actions and commitments Notes Previous versions: ver. 01.0 Initial adoption: SBM 016, 16 May 2025.