News live: Federal and South Australian governments sign Aukus cooperation deal as Pocock questions ‘enormous’ cost

The foreign affairs minister, Penny Wong, has written to the head of the International Atomic Energy Agency to formally request negotiations on oversight of the Aukus nuclear-powered submarine plans, amid ongoing pushback from China.

In a statement issued overnight, the IAEA’s director general, Rafael Grossi, noted the announcement by the leaders of Australia, the US and the UK “on Australia’s acquisition of conventionally armed, nuclear-powered submarines”.

In addition to Wong’s letter, Grossi said he had received separate communications on this matter from the prime minister, Anthony Albanese, as well as from the US and the UK, all reaffirming that “maintaining the integrity of the nuclear non-proliferation regime and Agency safeguards remains a core objective in relation to Aukus”. Grossi said:

I also note Australia’s previous declaration to the Agency that it does not intend to pursue uranium enrichment or reprocessing in relation to Aukus and that it has no plans to undertake nuclear fuel fabrication as part of this effort.

Grossi vowed to navigate the serious legal and complex technical matters “in an independent, impartial, and professional manner” and said the IAEA “must ensure that no proliferation risks will emanate from this project”.

He explained that article 14 of the IAEA’s existing comprehensive safeguards agreement “allows Australia to use nuclear material which is required to be safeguarded under the CSA in a nuclear activity, such as nuclear propulsion for submarines, provided that Australia makes an arrangement with the Agency in this regard”. He added:

Foreign Minister Wong has formally requested the Agency to commence negotiations on an arrangement required under Article 14 of Australia’s CSA. In accordance with the applicable norms (modified Code 3.1 of its Subsidiary Arrangements), Australia has also provided to the Agency preliminary design information related to this project.

Grossi promised to keep the IAEA board of governors and member states informed of the work, and to submit a report on this matter to the next regular session of the board in Vienna in June.