IMO's Net-Zero Framework Delay: Recalibrating Fuel Strategy Between Global and EU Compliance Tracks

What Changed at MEPC

At its 83rd session on 16 April 2025, IMO's Marine Environment Protection Committee adopted amendments to MARPOL Annex VI establishing the IMO Net-Zero Framework: mandatory marine fuel intensity limits paired with a global pricing mechanism for GHG-emitting fuels. Entry into force was originally targeted for 2027, marking the first global mandatory GHG pricing regime proposed for an entire transport sector.

That timeline shifted at the second extraordinary session, MEPC/ES.2, convened on 20 October 2025. Facing sustained opposition led by the US delegation, member states voted to defer formal adoption by one year, pushing the earliest realistic entry into force towards 2028. Subsequent intersessional working groups, ISWG-GHG 20 in October 2025 and ISWG-GHG 21 in April 2026, were tasked with renegotiating implementation detail rather than finalising settled text.

Why the Delay Matters Now

For yacht owners and operators, the postponement does not remove regulatory pressure, it redistributes it. EU FuelEU Maritime and RED III obligations run on their own calendar, independent of IMO's schedule. Vessels calling at EU ports remain subject to greenhouse gas intensity reduction targets that took effect from 1 January 2025, regardless of whether a global IMO mechanism is ready in parallel.

The practical effect is a widening gap between two regulatory tracks: a regional EU regime with binding penalties already enforceable, and a global IMO regime whose pricing structure and compliance mechanics remain unresolved. Technical managers negotiating fuel contracts now face genuine uncertainty over whether HVO, waste-based XTL, methanol or LNG procurement decisions made under EU compliance logic will align with whatever IMO ultimately adopts in 2028.

What to Monitor Next

Three developments carry direct operational weight for captains, technical managers and charter operators.

• MEPC 84, convened 1 May 2026: the session where member states were expected to resolve disagreement over the framework's carbon pricing tier structure, a detail that determines relative cost exposure across fuel pathways.

• ISWG-GHG 22, concluded 4 September 2026: its output signals whether the 2028 entry-into-force target remains credible or faces further slippage, information directly relevant to multi-year fuel supply contracts being signed now.

• Divergence risk between IMO and EU accounting methodologies: if IMO's eventual fuel intensity calculation differs materially from FuelEU Maritime's well-to-wake methodology, vessels compliant under one regime may face additional administrative burden proving compliance under the other.

None of this alters the immediate compliance obligation under EU rules, which applies irrespective of IMO's timeline. What it changes is the confidence with which operators can plan fuel strategy beyond the current EU compliance period. Contracts, retrofit decisions and ESG disclosures drafted on the assumption of imminent global alignment now carry a documented regulatory contingency that owners and class societies will expect to see addressed explicitly, not assumed away.