Opinion | The detention of an Iranian oil tanker is a test case for Western hypocrisy about the global order
- Several factors complicate the UK seizure of the Iranian ship. Did the UK have the right to impose EU sanctions on an Iranian vessel, or did it break UN laws? Other countries are waiting to see how the existing global order will be upheld

Now, the seizure of the tanker was no act of piracy. According to the United Nations Convention on the Law of the Sea, piracy consists of illegal acts “committed for private ends by the crew or the passengers of a private ship or a private aircraft, and directed … against a ship, aircraft, persons or property in a place outside the jurisdiction of any state”. The tanker was stopped by a state, not a private crew.
A second question pertains to the legal justification for the seizure. Britain said the vessel was carrying Iranian oil to Syria in violation of the European Union’s sanctions on Syria. But should the sanctions apply to countries other than EU members?
A third issue is whether the British action violated the law governing international navigation. The Strait of Gibraltar is a strait used for international navigation, which means that all ships are allowed “transit passage”, or freedom of navigation, through it under the UN convention. According to legal expert Donald Rothwell, ships should enjoy transit passage through the Strait of Gibraltar, “including through the territorial sea generated offshore to Gibraltar”.
