The structure of the International Maritime Organisation's (IMO) economic pricing mechanism — aiming to reduce the cost gap between conventional marine fuels and zero/near-zero emission alternatives — will be agreed on by the end of the week, including details on the cost of carbon emissions and whether remedial units will be included, IMO secretary general Arsenio Dominguez said today.
Dominguez said the focus of the economic pricing mechanism is not just to raise revenue, but also to support fuel transition. By the end of this week, Dominguez said he is confident that we will see the architecture of what the proposal looks like, including if a remedial unit will be included in the pricing mechanism and what the numbers will look like. Dominguez also said that non-compliant penalties, once agreed on as part of the proposal, will be implemented via a guideline which will be developed after this week. This will be in place by the "entry into force" in 2027, and will cover vessels above 5,000 gross tonnage (GT).
Dominguez confirmed that the latest discussions between member states have favoured a "crediting" system for alternative marine fuels as opposed to a "flat carbon levy", although these details are set to be finalised by 11 April. He highlighted three main points being discussed — the definition of "znz" (zero and near-zero emission fuels and technologies), the pricing mechanism itself, and the approach of governance when it comes to implementing the mid-term measures.
One of the main concerns raised by market participants on IMO's efforts has been potential regulatory conflicts, such as in the EU where the emissions trading system (ETS) was extended into maritime in 2024 and FuelEU Maritime came into effect in 2025. The concern could be that clashes between IMO global regulations and EU regulations could lead to uncertainty and confusion in the market, potentially weighing on fundamentals for alternative marine fuels. Dominguez said this topic has not yet been explored, but he expects EU member states to look into the respective legal clauses and there could be potential for a unified regulatory approach in line with the global regulation.
IMO had also been looking at raising the limit on biofuel content onboard a Type I barge to 30pc from the current limit of 25pc. The proposal for this was submitted to MEPC 83, with a view to approval. "The guidance allows conventional bunker ships certified for carriage of oil fuels under Marpol Annex I to transport blends of not more than 30pc by volume of biofuel, as long as all residues or tank washings are discharged ashore, unless the oil discharge monitoring equipment is approved for the biofuel blend(s) being shipped.", IMO said. The MEPC circular on interim guidance on the carriage of blends of biofuels and Marpol Annex I cargoes by conventional ships was approved today, subject to final editorial review and then to be released as a circular.
Dominguez addressed questions regarding the IMO carbon intensity indicator (CII) system, for which a review is expected. IMO's CII regulation, which came into force in January 2023, requires vessels over 5,000GT to report their carbon intensity, which is then scored from A to E. A and B vessel scores are regarded as superior energy efficiency, while C, D and E are considered moderate to inferior scores. Dominguez said the review is likely to take place in 2027, in which IMO will assess the positive aspects of CII so far and identify any further improvements needed.