Rubio in Abu Dhabi: US Draws Line on Strait of Hormuz Tolls
Marco Rubio in Abu Dhabi warns Iran against imposing tolls in the Strait of Hormuz, stressing international law and calling for clarity in ongoing Gulf negotiations.
Rubio’s arrival and clear stance in Abu Dhabi
Secretary of State Marco Rubio began a Gulf tour in Abu Dhabi by categorically rejecting any effort to levy charges on commercial shipping through the Strait of Hormuz. Rubio said such levies would violate established international norms for transit through global waterways and signalled Washington would not accept them.
His visit to the United Arab Emirates is the first of three planned stops in Gulf capitals as regional leaders seek to understand the contours of recent talks between the United States and Iran. The comments underscore the diplomatic focus on maritime security and the economic consequences of any attempt to alter passage arrangements in the strait.
Details of the U.S.-Iran memorandum and its limits
A memorandum of understanding signed in the first round of talks in Switzerland acknowledged Iran’s influence over parts of the strait and envisaged coordination between Iran and Oman on administration. The memorandum also included a 60-day commitment not to impose tolls, but it did not set permanent rules for what would follow beyond that period.
That gap in the agreement has heightened concern among Gulf states and international shipping firms, which worry that ambiguity could be exploited to introduce fees or restrictions later. Rubio highlighted that leaving the post-60-day status unspecified creates uncertainty that must be resolved in subsequent negotiations.
Tehran’s proposal and international shipping reactions
Iranian officials have publicly discussed the possibility of charging ships for transiting the waterway, describing the measures as fees for services rather than tolls. Shipping analysts and many maritime stakeholders have disputed that distinction, arguing any compulsory charge would function as a toll and contravene customary practice in international straits.
The prospect of new charges is especially sensitive because the Strait of Hormuz is a strategic chokepoint for global energy and trade flows. Gulf economies and international carriers have signalled they expect free passage to remain the norm, and Washington’s blunt response is meant to reinforce that expectation.
Inspections, nuclear oversight and conflicting public statements
Rubio also addressed reports about Iran’s commitments on nuclear inspections, saying U.S. negotiators understand there was an agreement to allow International Atomic Energy Agency oversight. Iranian officials have publicly denied making such concessions, a discrepancy that has introduced further ambiguity into the diplomatic record.
U.S. Vice President JD Vance and President Trump have both stated that Iran agreed to inspections after the Switzerland talks, but Tehran’s denials suggest domestic politics may be shaping its public posture. Rubio noted that whether Iran follows through will determine whether the process advances or requires new decisions from Washington.
Regional security and Iranian-backed groups
Rubio emphasised that any lasting cessation of hostilities must address the activities of well-armed groups backed by Iran across the region. He argued that armed proxy activity — including missile and drone strikes attributed to networks operating from Iraq and elsewhere — undermines prospects for a comprehensive end to conflict.
The memorandum’s language calling for “permanent termination of the war on all fronts” will, Rubio said, necessitate discussions about curbing proxy operations. He warned that without tangible steps to halt such actions, promises of peace would be difficult to sustain.
Economic incentives and the limits on U.S. investment
In his remarks, Rubio suggested Iran could attract significant foreign direct investment if it shifts away from revolutionary policies toward conventional state behaviour. He made clear, however, that any such investment would not involve direct U.S. government funding and would depend on Iran meeting international obligations.
That delineation signals a two-track approach: an openness to private-sector engagement if Iran reforms its regional conduct and nuclear transparency, paired with continued leverage from Washington to ensure compliance with commitments reached at the negotiating table.
Next diplomatic moves and Gulf consultations
After meetings in Abu Dhabi, Rubio is scheduled to travel to Kuwait and to participate in a Gulf Cooperation Council session hosted by Bahrain, bringing together leaders from Kuwait, Oman, Qatar, Saudi Arabia, the UAE and Bahrain. These gatherings will allow Gulf states to press for clarity on the memorandum’s practical implications for maritime security and regional stability.
Officials in the Gulf will seek reassurances about the future of transit rules in the Strait of Hormuz and expect Washington to coordinate closely with regional partners. Rubio’s public stance in Abu Dhabi is intended to reassure allies that the United States will not accept unilateral changes to the status quo affecting international shipping.
The negotiations that began in Switzerland now move into a more complex phase in which ambiguous language and competing public claims must be resolved. How Tehran clarifies its position on inspections, fees for transit, and proxy activity will determine whether diplomacy can deliver a durable reduction in tensions or whether leaders will face difficult policy choices in the months ahead.