In a joint statement, Secretary of State Rubio, Secretary of Energy Wright, and Secretary of Transportation Duffy announced that the United States will oppose the proposed NZF carbon reduction framework under consideration by the International Maritime Organization (IMO). The measure, aimed at reducing global CO₂ emissions from international shipping, would mark the first time a UN agency imposes a global carbon tax on the sector.
The statement emphasized that the Trump Administration “unequivocally rejects” the proposal, asserting that it would unfairly burden U.S. consumers, businesses, and the broader economy. Officials warned that the NZF could raise global shipping costs by 10% or more, harming trade competitiveness and energy security.
The U.S. outlined a series of potential retaliatory measures against nations supporting the NZF framework, including:
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Port restrictions on vessels flagged by supporting countries
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Visa limitations and increased fees for foreign maritime crew
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Commercial and contractual penalties related to U.S. government projects
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Additional port fees and sanctions targeting officials and organizations advancing the proposal
Labeling the initiative a “European-led neocolonial export of climate regulations,” the statement reaffirmed Washington’s stance against international policies it considers economically punitive. The U.S. delegation has urged other IMO members to reject the NZF when it comes to a vote later this month, citing the need to protect “collective economic and energy security.”
