The last time the board took the step of formally declaring Iran in breach of its safeguards obligations was in September 2005.
The Iranian push for enrichment comes as Iran and the US continue to consider a fifth round of indirect talks.
Iran and the US are due to hold a second round of talks in Oman on Saturday over Tehran's escalating nuclear program, with President Donald Trump threatening military action if there is no deal.
Opposition head Yair Lapid's cited three reasons for opposing independent Saudi enrichment of uranium.
With each passing day, the would-be Hitler of Persia is drawing ever closer to his goal of obtaining a nuclear arsenal, threatening everyone and everything that all of us hold dear.
Sources have indicated that the E-3 is still concerned that Israel or Trump may only push Iran over the nuclear weapons line.
The board also requested a "comprehensive" report to pressure the Islamic Republic into new nuclear talks.
EU unsure Tehran ready for concessions or just looking to relieve pressure, play for time
Diplomats said Iran was responding to last week's IAEA board resolution against it by expanding its uranium-enrichment capacity at its two underground enrichment sites at Fordow and Natanz.
Diplomats say that the escalation is not as big as feared, and involves installation of clusters of centrifuges, the machines that enrich uranium, at both its underground enrichment sites.