Connecting the Med ECA with the new Atlantic ECA, regulatory bodies managed to wrap the European continent in a unified environmental control zone

In the concluding report of the IMO Marine Environment Protection Committee (MEPC) 84, that met in London from April 27 to May 1, 2026, the proposed Net-Zero Framework survived intense geopolitical lobbying despite suffering a delayed implementation. The framework represents a critical roadmap for the decarbonization of global shipping and proposed lower emissions-intensity reduction targets of 4% in 2028, scaling up to 30% by 2035, alongside an upper target scaling from 17% to 43% over the same period.

Despite securing the approval of 80% of eligible voters, intense lobbying led by the United States, Saudi Arabia, and their allies convinced 57 countries to back an adjournment. As the report clearly states in its executive summary “It was clear at this stage that finding a compromise position between those advocating for the draft Net Zero Framework to be adopted with minimal change and those in favor of a market readiness approach was not possible.” Consequently, the final adoption has been pushed back by a full year. Instead, an intersessional Working Group (ISWG-GHG) was established to lead to a convergence ahead of MEPC 85, tentatively scheduled for November 30 to December 3, 2026.

A primary friction point revolved around the creation of a dedicated IMO fund for developing countries during the green transition. The usual bargaining took place: on the one side, these nations considered this fund as an essential pillar of equitable decarbonization; on the other side, major shipping nations were proposing alternative and practically mutually incompatible frameworks. Japan’s proposal, for example, suggested eliminating the mandatory payment for ships failing to meet their emission targets. This financial turmoil highlighted the complexity of imposing a unified economic scheme on deeply fragmented global industries—and interests.

However, while GHG measures are stalling due to geopolitical friction, regional environmental protections are moving forward. A major milestone achieved at MEPC 84 was the official adoption of the world’s largest Emission Control Area (ECA) for Nitrogen Oxides, Sulphur Oxides, and Particulate Matter in the Northeast Atlantic. For stakeholders in the Mediterranean area, the Atlantic expansion bends to the existing Mediterranean Sea Emission Control Area for Sulphur Oxides and Particulate Matter (Med SOx ECA). By physically connecting the Med ECA with the new Atlantic ECA, regulatory bodies managed to wrap the European continent in a unified environmental control zone. The results are a relief for the Mediterranean basin: no more geographic loopholes for vessels transiting thought the Strait of Gibraltar, so that shipowners operating in the Mediterranean-Atlantic corridors are now obliged to adopt transitional fuels like LNG or install exhaust gas cleaning systems. This is a major milestone in environmental protection that was adopted in the same context where IMO’s broader global GHG framework seemed to be falling apart.

At the same time, several regulatory cases are questioning the way a decarbonizing maritime sector should reduce other environmental risks and hazards. The Korean Register (KR) of the IMO is currently leading two expert groups focused on managing toxic ammonia effluent and addressing the failure of NOx reduction technologies of alternative fuels. Simultaneously, the IMO is developing models to accurately trace emissions across a fuel entire lifecycle, to ensure supply chain environmental integrity and transparency. The MEPC also finalized critical amendments to the Ballast Water Management (BWM) convention, mandating that ships must now actively prove not merely the installation but also the actual operational efficiency and deployment of D-2 standards systems.

Interestingly, the contrast between this push for efficiency and air/water quality and the crisis on GHG target is still producing ecological co-benefits. While politicians continue to debate financial mechanisms, the technical frameworks established at MEPC 84 ensure that the physical transformation of the global fleet marches steadily onward.