One of the principal achievements of the 1994 Agreement establishing the World Trade Organization was the new mechanism for dispute settlement, embodied in the Understanding on Rules and Procedures Governing the Settlement of Disputes. While its predecessor, the General Agreement on Tariffs and Trade of 1947 (and the 1979 Agreements resulting from the Tokyo Round of Multilateral Trade Negotiations) had already evolved, to a considerable degree, from a negotiating forum for the conduct of world trade diplomacy to a “judicial” system properly so called, the WTO Dispute Settlement Understanding nevertheless marked a decisive step forward.