The report described how the provision was one of the largest concessions made to Iran during the recent negotiations. Tehran Rejected Earlier Proposals – and Got What It WantedOman initially presented Tehran with a Gulf-backed proposal intended to open the Strait of Hormuz on July 28. Tehran rejected the deal and regional management of the Strait, however, insisting that only Iran and Oman, as the two coastal states, should administer the waterway. After all, the Strait of Hormuz is Tehran’s biggest point of leverage. But Tehran can also see pressure on Washington, with disruptions in Hormuz affecting global oil prices.