Iran's Parliament Approves Bill for Toll Fees on Ships in Strait of Hormuz

Iran's parliament has approved a controversial bill imposing toll fees of up to $2,000,000 on commercial vessels transiting the Strait of Hormuz, a move that threatens to disrupt one of the world's most critical maritime chokepoints and escalate tensions across the Persian Gulf region.

The legislation, which requires all fees to be paid in Iranian rials, would apply to foreign-flagged ships passing through the narrow waterway that connects the Persian Gulf to the Gulf of Oman and the open ocean beyond. Approximately one-fifth of the world's daily oil supply, roughly 21 million barrels per day, passes through the strait, making it the single most important oil transit route on the planet.

The bill's passage marks a significant escalation in Tehran's longstanding assertions of sovereignty over the strait, which at its narrowest point spans just 33 kilometres between Iran and Oman. Under the United Nations Convention on the Law of the Sea, vessels enjoy the right of transit passage through international straits, a principle that major maritime powers have long insisted applies to the Strait of Hormuz. Iran, which has not ratified the convention, has periodically challenged this interpretation.

The requirement that tolls be denominated in Iranian rials adds a further layer of complexity. With the rial under severe pressure from international sanctions, the provision could serve as a mechanism to generate demand for Iran's beleaguered currency while simultaneously complicating compliance for shipping companies that would need to acquire rials on restricted foreign exchange markets.

For Qatar, the legislation poses a direct strategic concern. The world's largest exporter of liquefied natural gas relies heavily on unimpeded passage through the strait to deliver LNG cargoes to customers across Asia, Europe, and beyond. Any disruption to transit or imposition of additional costs on shipping could ripple through global energy markets at a time of already elevated volatility.

Gulf Cooperation Council states have historically maintained that freedom of navigation through the strait is non-negotiable. Doha, which has pursued a policy of diplomatic engagement with Tehran while maintaining close security ties with Washington, may find itself navigating a delicate balance as regional reactions take shape.

International shipping industry groups are expected to challenge the legality of the measure, arguing that unilateral toll imposition on an international strait violates established maritime law. The United States, which maintains a significant naval presence in the region through its Fifth Fleet based in Bahrain, has not yet issued a formal response, though Washington has historically treated any threat to free navigation in the strait as a red line.

The bill must still receive final approval from Iran's Guardian Council before it can take effect. Analysts say that even if the legislation is ultimately implemented, enforcement would present enormous practical and diplomatic challenges, though the mere passage of the bill sends a powerful signal about Tehran's willingness to leverage its geographic position amid ongoing geopolitical pressures.