IMO Net-Zero Framework Implementation Guidelines
IMO guidelines for the draft Net-Zero Framework cover GFI calculation, compliance approaches and the IMO GFI Registry; none had been adopted by September 2026.
The Net-Zero Framework implementation guidelines are the IMO guidelines that the draft Chapter 5 of MARPOL Annex VI (MEPC/ES.2/2) refers to but does not contain, including the guidelines on which the issuance of surplus units under draft regulation 36.11 depends (footnote 89, “to be developed”). They are being drafted by the Intersessional Working Group on GHG .
ISWG-GHG 20 (20 to 24 October 2025) discussed draft guidelines on GFI calculation, GFI compliance approaches and the IMO GFI Registry and invited the sponsors to merge their drafts. ISWG-GHG 21 (20 to 24 April 2026) asked the Secretariat for Registry costs and functional requirements, and ISWG-GHG 22 (1 to 4 September 2026) deferred the guidelines to ISWG-GHG 23. The full article will track each draft against the GFI Calculation Guidelines and the IMO Net-Zero Framework .