The United States for at least sixteen years has had serious concerns with whether the World Trade Organization (WTO) dispute settlement system was operating according to the terms upon which WTO Members had agreed. While the United States has been a major supporter of the WTO system and the dispute settlement system generally, concerns about sovereignty and the proper functioning of the system have been important since at least 2002, reflected in U.S. legislation and actions by three administrations. Concerns have existed on (1) whether panels and the Appellate Body have honored the limitations contained in Articles 3.2 and 19.2 of the Dispute Settlement Understanding (DSU) not to create rights or obligations; (2) the issuance of advisory opinions on issues not raised or not necessary to the resolution of the dispute; (3) actions of the Appellate Body that permit deviation from the DSU without affirmative authorization by the Dispute Settlement Body (DSB); and, former Appellate Body members continuing to be involved in cases after their term has expired (failure to complete appeals in the DSU required maximum time of ninety days). These are all issues that have concerned the United States for years but also have been raised by other members.