The United States, Britain, France and Germany are seeking a resolution by the International Atomic Energy Agency’s (IAEA) ‌board next week reporting Iran to the UN Security Council for the first time in 20 years, according to diplomats and the proposed text seen by Reuters.

If passed, the resolution would follow up on one adopted on June 12 last year declaring Iran in breach of its non-proliferation obligations for not ​fully cooperating with an investigation into uranium traces found at undeclared sites.

A resolution by the IAEA’s 35-nation ​board reporting Iran to the Security Council would also be the culmination of a standoff over IAEA access to those sites, since the board has passed two resolutions in the past year demanding Tehran declare its enriched uranium stocks and grant the watchdog full access to verify them.

“[The board] requests the [IAEA] ​director general to transmit this resolution and the previously adopted resolutions … to all members of the Agency and to the Security Council ​and the General Assembly of the United Nations,” says the latest resolution draft seen by Reuters.

It also “reiterates its call upon Iran to urgently remedy ‌its non-compliance ⁠with its Safeguards Agreement by taking all steps deemed necessary by the Agency and the Board, so that the director general can provide the necessary assurances regarding the correctness and completeness of Iran’s declarations”.