US Warns of Tariffs and Port Levies Against Nations Backing UN Shipping Emissions Pact
The United States has warned countries to reject a United Nations-backed agreement to cut marine fuel emissions, threatening to impose tariffs, visa restrictions, and port levies on those who support the accord, according to US and European officials.
The Trump administration, which has frequently used tariffs as leverage in trade disputes, is seeking to expand Washington’s influence in global shipping.
The warning comes in response to a draft agreement reached in April under the International Maritime Organization (IMO) that would impose fees on ships exceeding global carbon emissions limits.
US Pushback Against “Net-Zero Framework”
Washington withdrew from the IMO negotiations before the draft was finalized and announced in August that it would retaliate against supporters.
US officials argue the measures would impose heavy costs on the shipping sector while delivering limited emissions benefits.
In recent days, the US State Department has contacted IMO member states, urging them not to adopt the so-called “Net-Zero Framework” when it goes to a vote at an extraordinary IMO session in October.
A State Department spokesperson confirmed that the US is “actively exploring and preparing to act on remedies including tariffs, visa restrictions, and/or port levies should this effort succeed.” The official also said Washington is encouraging allies to consider similar countermeasures.
The Dutch government confirmed it had received a verbal warning from US officials, who indicated the Netherlands could face trade penalties if it backs the framework. It is not yet clear which other countries have been approached.
The IMO, based in London, regulates international shipping safety, security, and pollution. It has stressed that October’s meeting will allow member states to address concerns before the framework is adopted.
Shipping accounts for nearly 3% of global CO2 emissions, with 90% of world trade carried by sea. Without decisive action, emissions are expected to rise sharply in coming decades. The IMO framework aims to accelerate the decarbonisation of the sector.
The draft deal passed earlier this year with the backing of 63 countries, while 16 opposed and 24 abstained. Final adoption will require a majority, though observers warn that additional abstentions could block the agreement.
The outcome of October’s session is set to determine whether the IMO can deliver a binding international mechanism to reduce shipping emissions—or whether geopolitical tensions will derail global climate efforts at sea.
