Proclamation of August 27, 1917, further restricting exports; explanatory statements by the President and the Exports Administrative Board—Bunker license rules of August 31 and October 5—Denial of licenses for shipments through the war zone in sailing vessels—Proclamation of September 7 restricting exports of coin, bullion, and currency—Refusal of the United States to join in the proposed notice to neutral banks—Suspension by the United States and the Allies of licenses for exports to the northern European neutrals—Further discussion with the Allies regarding agreements with the neutrals