Tehran Welcomes Revival Of Diplomacy If U.S. Takes Tangible Steps; Iran Can Reopen Hormuz Within Seven Days If The U.S. Eases Military Pressure, Lifts Port Blockade; Iran's Proposal Was Delivered To Us Via Mediators On September 16; Iranian Delegation Is In New York With Full Authority To Revive Diplomacy; Details Of Agreement To End Hostilities Can Be Discussed In New York Via Mediators