Deal delayed, not derailed as IMO edges towards net zero framework
The International Maritime Organization’s latest environment meeting ended last week with a split message for shipping. On one hand, MEPC 84 failed to deliver the decisive breakthrough many had hoped for on the IMO Net-Zero Framework. On the other, it produced one of the most significant air-pollution decisions in recent years: the formal adoption of the North-East Atlantic Emission Control Area.
The 84th session of the Marine Environment Protection Committee, held in London from 27 April to 1 May 2026, closed with the global greenhouse gas package still unresolved, but with a major regional clean-air regulation now moving into law. The new ECA will introduce stricter limits on nitrogen oxides, sulphur oxides and particulate matter in a vast area of the North-East Atlantic, with entry into force set for 1 September 2027 and the ECA taking effect 12 months later in 2028.
For shipowners, operators and fuel suppliers, the message is clear. The IMO’s wider decarbonisation framework may still be subject to difficult political negotiation, but the regulatory direction is not softening. MEPC 84 showed that where technical evidence is mature, and where coastal states can align around a defined environmental problem, the IMO can still produce binding outcomes.
The North-East Atlantic ECA was adopted through amendments to MARPOL Annex VI. It covers the territorial seas and exclusive economic zones of the Faroe Islands, France, Greenland, Iceland, Ireland, Portugal, Spain and the United Kingdom, while excluding waters already covered by the North Sea ECA. The legal text also introduces NOx Tier III requirements for ships constructed on or after 1 January 2027 when operating in the North-East Atlantic ECA. Under the circular letter text, this construction trigger is defined by contract date, keel-laying date or delivery date, depending on the vessel’s circumstances.
The importance of the new ECA is not only its size, but its position. It connects existing and emerging low-emission zones across the Baltic, North Sea and Mediterranean with those in the Norwegian Sea and Canadian Arctic. In practical terms, it helps close a major regulatory gap across a busy shipping corridor stretching from Iberia to Greenland. ICCT has described the new area as covering a region home to more than 190 million people, and as a link between existing ECAs in northern and southern Europe and recently approved Arctic-related zones.