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What is the IMO’s Mid-term measures and how it works

Abstract

The International Maritime Organization (IMO) and the European Union (EU) have been expanding their GHG emissions regulatory frameworks, creating a situation where shipping operators must take action. In international shipping, the IMO revised its 2018 Initial Strategy for GHG emissions reduction by adopting the 2023 IMO GHG Reduction Strategy in July 2023. This Strategy sets a clear goal of achieving net-zero GHG emissions from international shipping by or around 2050. As a specific measure to achieve the goal, the IMO has been developing a new regulatory framework combining technical and economic elements, known as “mid-term measures.” At the 83rd session of the Marine Environment Protection Committee (MEPC83) held in April 2025, draft amendments to MARPOL Annex VI which include the following two provisions were approved as specific regulations under the mid-term measures: GHG intensity regulations for fuels used (GFI regulations) Promotion of decarbonization through the IMO Net-Zero Fund. These measures will require shipping companies to review their fuel choices and cost structures, and strategic action will be even more important going forward. The first step in responding strategically to these measures is to understand them correctly. This document provides a clear explanation of the regulations to help shipping companies improve their understanding of mid-term measures, and also introduces our support services to assist with mid-term measures. ClassNK hopes this document will help all stakeholders in the shipping sector in their efforts to achieve decarbonization.