1540 is only the second resolution to invoke Chapter VII without relating the fact to a specific time and place , the first being United Nations Security Council Resolution 1373 , which was voted in the aftermath of the September 11 attacks as an attempt to counter international terrorism . The possibility of terrorists accessing WMD was already considered in Resolution 1373 paragraph 3a and 4 , and UNSCR 1540 emerged from those two paragraphs
September 11 attacks
September 11 attacks
United Nations Security Council Resolution 1540