TEHRAN (FNA)- Chairman of the Iranian parliament’s National Security and Foreign Policy Commission Mojtaba Zonnouri said that Washington should implement its delayed undertakings based on the nuclear deal to return to the internationally-endorsed agreement.

“The US return to the nuclear deal depends on implementation of their undertakings,” Zonnouri said on Wednesday.

He also referred to the Iranian parliament’s bill to adopt strategic measures to remove sanctions against the country whose single-urgency was approved earlier this month, and said based on the parliament’s bill the International Atomic Energy Agency (IAEA) can have access to Iran’s nuclear sites only based on the Non-Proliferation Treaty (NPT) and the Safeguards Agreement.

Elaborating on the contents and measures in the bill, he said the government will, for instance, be required to enhance enrichment purity levels to 20% unless the "Europeans revive their undertakings". "If the government reports to the parliament that they (Europeans) have adopted these measures and have revived their undertakings, then at this level and under such circumstances, the government can propose reciprocal moves; yet it will be the parliament to make the final call over the proposal,” Zonnouri added.

Under the parliament’s bill, the Atomic Energy Organization of Iran (AEOI) is required to start in two months after the approval of the present bill to produce at least 120 kg of 20%-enriched uranium annually at Fordow nuclear site and store it inside the country, increase the enrichment capacity and production of enriched uranium to at least 500 kg per month, start the installation of centrifuges, gas injection, enrichment, and storage of materials up to proper purity levels within 3 months, via at least 1000 IR-2m centrifuges in the underground part of Shahid Ahmadi Roshan facility in Natanz, transfer any enrichment, research, and development operations of IR-6 centrifuges to the nuclear site of Shahid Ali Mohammadi in Fordow, and start enrichment operation via at least 164 centrifuges and expand it to 1000 by the end of 20 March 2021 (end of the Iranian calendar year) and return the 40 megawatts Arak heavy water reactor to its pre-JCPOA condition by reviving the heart (calandria) of the reactor within 4 months from the date of the adoption of this law.

Also, the government is required to suspend the nuclear deal-based regulatory access beyond the Additional Protocol within 2 months after the adoption of this law based on the articles 36 and 37 of the nuclear deal, after 3 months from the adoption of this law, if Iran's banking relations in Europe and the amount of oil purchases by them from Iran is not back to normal and to satisfactory conditions, the government is required to stop the voluntary implementation of the Additional Protocol and if, after 3 months from the adoption of this law, the nuclear deal parties return to fulfill their undertakings, the government is required to submit a proposal to the parliament for Iran's reciprocal action to return to the nuclear deal undertakings, it added.

The bill also underlined that those who refuse to implement the law will be sentenced and punished based on the country’s laws.

US President Donald Trump, a stern critic of the historic deal, unilaterally pulled Washington out of the JCPOA in May 2018, and unleashed the “toughest ever” sanctions against the Islamic Republic in defiance of global criticism in an attempt to strangle the Iranian oil trade, but to no avail since its "so-called maximum pressure policy" has failed to push Tehran to the negotiating table.

In response to the US’ unilateral move, Tehran has so far rowed back on its nuclear commitments four times in compliance with Articles 26 and 36 of the JCPA, but stressed that its retaliatory measures will be reversible as soon as Europe finds practical ways to shield the mutual trade from the US sanctions.

Tehran has particularly been disappointed with failure of the three European signatories to the JCPOA -- Britain, France and Germany -- to protect its business interests under the deal after the United States' withdrawal.

On January 5, Iran took a final step in reducing its commitments, and said it would no longer observe any operational limitations on its nuclear industry, whether concerning the capacity and level of uranium enrichment, the volume of stockpiled uranium or research and development.