The draft invokes Chapter 7 of the UN Charter, under which the council can resort to economic or diplomatic sanctions, or even military action, to ensure its decisions be implemented.

The draft was circulated at a closed-door meeting of the 15-nation Security Council, days after the International Atomic Energy Agency (IAEA) sent a new report to the council confirming Iran's non-compliance with its demand to suspend enrichment
activities.

After weeks of tough negotiations, the council adopted a presidential statement at the end of March urging Tehran to comply with the IAEA's demands to build confidence in the peaceful nature of Iran's nuclear program.

The draft resolution "calls upon Iran without further delay to take the steps required by the IAEA Board of Governors" and "decides, in this regard, that Iran shall suspend all enrichment-related and reprocessing activities, including research and development, to be verified by the IAEA, and suspend the construction of a reactor moderated by heavy water."

The measure also "calls upon all states to exercise vigilance in preventing the transfer of items, materials, goods and technology that could contribute to Iran's enrichment-related and reprocessing activities and missile programs."

The IAEA would be requested to present another report within an unspecified timeframe on whether Iran implements the resolution. The council would "consider such further measures as may be necessary to ensure (Iran's) compliance with this resolution," the draft says, alluding to coercive actions, including economic or diplomatic sanctions.

But the draft also notes that "full verified compliance by Iran,confirmed by the IAEA board, would avoid the need for such additional steps."

Iran insists its activities are solely for energy purposes but the United States and some other countries claim it is
clandestinely seeking to produce nuclear weapons.

Last August, Iran rescinded its voluntary suspension of nuclear fuel conversion, which can produce the enriched uranium necessary either for nuclear power generation or for nuclear weapons.