US State Department Legal Adviser Jennifer Newstead and other members of the US delegation tried to justify Washington's unilateral exit from Iran nuclear deal and re-imposition of sanctions on Tehran.
They also claimed that the ICJ lacks the jurisdiction in Iran sanctions case.
Iran argues that the re-imposed US sanctions violate a Treaty of Amity signed between the two countries in 1955.
The US lawyers said that the reinstated sanctions are aimed at protecting US national security, adding that the 1955 Treaty of Amity was a legal dodge.
The nuclear restrictions on Iran by Iran nuclear deal were not sufficient, Newstead said, adding that failure to address Iran ballistic missile issue was one of the defects of the pact.
Reiterating that the UN's top court has no jurisdiction in the case, the head of the US delegation said that Iran's request from ICJ to order Washington to suspend the sanctions temporarily while it hears Iran’s case in full – a process that could take years – must be rejected.
A provisional ruling is expected within a month, though no date has been set.
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