Best signals source indicates the window for concern is March 21 to April 8 to watch for a multiple front offensive by Tehran.
The window has been in the signals since last December, so it is not tied to the UN Security Council action with regard the IAEA referral.
The window may already have achieved its aim by intimidating and marshalling the disparate elements of the Iranian war plan. Syria, Hizballah, Sadr, AlQ, Russia, Cairo, Beijing -- and more, all these are elements in the war plan.
The war plan has three distinct targets:
1. War on oil. To break the U.S. resistance by driving the price of oil into the $80-$100 region and hacking into all GDP projections.
2. Wipe Israel off the map. A decap strike at Jerusalem is credible, or a strike that separates Israel from its supporters.
3. The U.S. political apparatus. Iran has determined that the U.S. cannot deal effectively with a foreign policy crisis in an election year.