Iran is working to establish a system of approved passage for ships through the Strait of Hormuz, a tightening of control over the crucial waterway that Tehran suggests could extend beyond its war with the US and Israel.
US President Donald Trump has repeatedly demanded Tehran open the narrow strait, through which about 20 per cent of the world’s oil exports passed before Iran closed it to almost all shipping at the start of the war.
Tehran’s foreign ministry this week said “non-hostile” vessels would be allowed to pass through “in co-ordination with the competent Iranian authorities” — but that US, Israeli or any other “participants in the aggression” would not.