This article argues that Article XXIV and special and differential treatment (SDT) provisions of the WTO present a number of constraints and opportunities to the design and scope of the proposed economic partnership agreements between the European Union (EU) and African, Caribbean and Pacific (ACP) countries. It examines the negotiating positions of both sides to argue that were the EU's position to prevail, ACP and other developing countries would likely suffer an erosion of the development principles embedded within the WTO. It is shown that the differences between the two groups over the desirability and/or applicability of negotiating free trade agreements between developed and developing countries under the strict jurisdiction of Article XXIV, and of negotiating agreements on services and the Singapore Issues , amount to a contestation over the principles of reciprocity and SDT within the WTO, and of the scope of the WTO.