The IMO's Marine Environment Protection Committee closed its 84th session in London on May 1 with a majority of member states accepting the Net-Zero Framework as the basis for further work, according to the IMO's account of the session. The decision on adoption now moves to a resumed extraordinary session set for December 4.
The outcome quietly reverses the shock of October 2025, when an extraordinary session convened specifically to adopt the framework adjourned without a result and left the industry's decarbonization timetable in doubt. For owners weighing fuel choices on newbuild orders, the planning signal is back, even if the decisive vote is seven months away. MEPC 84 met from April 27 with much of the market's attention consumed by the closure of the Strait of Hormuz; the regulatory calendar, at least, has recovered some predictability.
The majority swings back
Delegates worked through 57 documents under committee chair Dr Harry Conway of Liberia, with Hanqiang Tan of Singapore as vice-chair, and established a working group on the framework. The substantive shift was political rather than textual: a majority of member states now accept the Net-Zero Framework, as approved in early 2025, as the basis for moving forward, reversing the majority that forced the late-2025 adjournment. Alternative proposals tabled this session gained no meaningful support. Divergence has not disappeared, and the design of a fund remains the most visible open question, but the direction of travel is once again toward adoption rather than away from it.
Environmental groups gave the result a mixed reception, acknowledging the renewed momentum while calling the further delay to adoption unnecessary.
The December timetable
The adoption question goes to a resumed Second Extraordinary Session on December 4, 2026, convened immediately after MEPC 85, which runs from November 30 to December 3. Two intersessional working group meetings, one in early September and one in late November, will prepare the ground. That schedule compresses the remaining negotiation, above all on the fund, into two working-level meetings; whatever consensus exists on December 4 will largely have been built there, not in the plenary. The Global Maritime Forum's guide to the framework sets out how its fuel-intensity targets and pricing mechanism are designed to work.
A new emission control area and a crowded docket
The session also produced the most consequential regional measure in years: a designated North-East Atlantic Emission Control Area covering the waters of Greenland, Iceland, the Faroe Islands, Ireland, the United Kingdom, France, Spain and Portugal. The ECA takes effect on September 1, 2027, with a 0.10 percent sulphur limit applying 12 months later and Tier III NOx requirements applying to ships contracted on or after January 1, 2027, according to a summary published by DNV.
Beyond the framework, MEPC 84 adopted three guidelines for measuring methane and nitrous oxide emissions, bringing actual tank-to-wake values into the lifecycle assessment system; approved a package of amendments to the Ballast Water Management Convention with stronger survey and sampling provisions, expected in force around spring 2028; agreed to develop a standalone, legally binding instrument on biofouling; adopted a 2026 marine plastic litter strategy targeting zero plastic discharges by 2030; approved terms of reference for the Fifth IMO GHG Study; began the second phase of the SEEMP and CII review, targeting 2028; and approved draft amendments to the NOx Technical Code covering engines burning non-carbon fuels.
The road to December
December 4 is now the date the industry plans around. If the two intersessionals can settle the fund question, adoption would restore a clear global trajectory for fuel-transition investment and give yards and owners a firmer basis for the propulsion choices embedded in every newbuild contract. A second failure would be more damaging than the first: October 2025 could be read as a procedural stumble, but a repeat would suggest the majority now visible on paper cannot survive contact with a vote. In the meantime, the North-East Atlantic ECA is a hard compliance item with fixed dates. Owners trading to northern Europe have a September 2027 start line for fuel planning, and anyone contracting newbuilds for those waters faces a January 1, 2027 cut-off for Tier III NOx that arrives well before the framework's fate is known.
