Article Six of the Non-Proliferation Treaty (NPT) makes it obligatory for nuclear states to get rid of their nuclear weapons as part of a bargain that requires the non-nuclear states not to acquire nuclear weapons. Apart from the NPT provisions, there have been a number of other rulings that have reinforced those requirements.
The ambitions of a unilateral Israeli strike on Iran, as harboured by Israeli Prime Minister Benjamin Netanyahu and Defence Minister Ehud Barak, have been defeated by internal opposition, a growing number of observers have come to believe in the wake of dramatic opposing statements by prominent Israeli leaders, including President Shimon Peres.
U.S. President Barack Obama Sunday made a clear statement against a rush to war - either by the U.S. or Israel - with Iran, while also emphasising that he would pursue that option if alternatives were unsuccessful in ensuring that Iran would not develop a nuclear weapon.