Washington, Mar 17: US Defense Secretary Donald Rumsfeld has said he could not be sure that a June 30 date would be met for ending the US-led occupation of Iraq and handing sovereignty over to Iraq. ''Everybody, including the Iraqi governing council, has set that date as a target,'' he said. ''And do I think it will happen? It has a chance of happening, yes. Will it happen for sure? Who knows? I don't know what's going to happen tomorrow,'' Rumsfeld added. The United States, the United Nations and the US-appointed Iraqi governing council set the date for restoring Iraqi self-governance, which ended with the US led invasion a year ago that toppled President Saddam Hussein. ''What we do know is that the Iraqis and the coalition have worked together, and the Iraqis have produced an interim constitution. They're pointed towards the date of June 30th. And why can't we just wait and see how well they do? They've done pretty darn well so far,'' Rumsfeld added. Although the Iraqis have taken the important step of agreeing on an interim constitution until elections can be held at the end of this year or in 2005, they and US authorities have not yet agreed on the form of the Iraqi body that would take power in Iraq on the return of sovereignty. A state department official, speaking on condition of anonymity, said that ''right now we are working toward a June 30 sovereignty transfer and that's our operating assumption.'' Bureau Report