In 1927, when Coquet launched his movement for a European customs union, Riedl initiated an elaborate programme to use the League to bring about Anschluss gradually by embedding Austro-German bilateral economic integration in a multilateral system. He sought to bypass the formal treaty constraints that prevented the Austrian and German governments from pursuing this course by facilitating low-level administrative rapprochement through business organizations, using the Vienna Chamber of Commerce and the International Chamber of Commerce (ICC). By the time Riedl arrived in the ICC in 1927, it had already become an important organizational auxiliary to the League. Up to that point, the ICC’s engagement in League trade policy had focused on specific areas of business regulation, such as commercial arbitration and trade credit. Riedl pushed the ICC into a more political role by intervening in debates about the fundamental architecture of trade treaties. In the process, Riedl provoked new debate about the League’s authority to mediate relations between national governments and international business.