The US and Iran exchanged hostilities this week, including US military airstrikes, prompted ​by attacks on ships that Washington said Tehran carried out.

The attacks renewed concerns about the recovery ​of global oil supplies and shipping and highlighted the fragility of an interim ⁠truce to end the more than four-month conflict while the US and Iran hammer out a lasting agreement.

The ​UN’s London-based International Maritime Organisation (IMO) is responsible for regulating the safety and security of international shipping and preventing ​pollution, and comprises 176 member states.

Protection of vital shipping lanes was discussed at a session this week of its 40-member governing council. Gulf countries, the United States and Iran clashed over the future of the strait.

No recognition of Iran’s sovereignty claim, IMO council says

The IMO Council “strongly condemned” Iran’s decision to “establish an entity purporting to control traffic through ​the strait,” according to the text of a non-binding decision reached.

The Council decision called upon member states not to recognise “Iran’s ‌claim ⁠of sovereignty over the Strait of Hormuz, its assertions of jurisdiction over the maritime zones of third states in and around the strait, which violated the sovereignty, sovereign rights and exclusive jurisdiction of these states” and not to recognize any Iranian decisions aimed at “closing, obstructing, hampering or otherwise interfering with international navigation and ​the right of transit passage”.

Iran’s ​recently created Persian Gulf ⁠Strait Authority said in an advisory in June that no vessel was permitted to pass through the waterway “without a valid passage permit” issued by the body.

Iran, which ​does not have a seat on the Council, told IMO delegates this week ​it rejected “the ⁠selective, politically motivated and legally unfounded allegations” made against it.

Iran was not a party to the UNCLOS international maritime convention and was “not bound by the treaty-based regime”, its IMO delegation said.

“The measures implemented by … Iran are intended ⁠to uphold ​maritime safety and security, prevent the provision of support or ​assistance to acts of aggression, safeguard Iran’s sovereignty and vital security interests, and ensure that navigation remains safe and non-threatening. These measures ​do not constitute the closure of the strait,” Tehran’s delegation said.