A document released by Iran’s state news agency IRNA proves that United States, Britain, France, China, Russia plus Germany are all helping Iran redesign its Arak heavy water reactor so that it cannot produce weapons-grade plutonium, reported Reuters.

The document was signed separately on November 13, 17 and 18 by the foreign ministers of the six countries in question with Iran, with EU foreign policy chief Federica Mogherini as well.

The agreement became effective on the date it was signed by all states.

According to Trade Arabia Iran will act as project manager while China “will participate in the redesign and the construction of the modernised reactor” and the US “will provide technical support and review of the modernised reactor design”, as stated in the document.

As for France, the United Kingdom and Germany, they will participate in design review with Russia providing consultative services.

“The primary design of Arak reactor will take one year. Then the (P5+1) working group has three months to approve it,” Behrouz Kamalvandi, spokesman for Iran’s atomic energy agency, was quoted as saying by IRIB.