Judge and Expert: The "Rueff Affair" or the Codification of the Rules of International Circulation The appointment of Jacques Rueff, a member of the Court of Justice of the European Communities, to the position of economic and financial advisor to the French government following General de Gaulle's return to power occasioned much discussion in community circles between 1958 and 1962. By examining this "affair", the present article seeks to reveal the institutional power struggles that preceded the codification of the rules of international circulation. These power struggles defined the very conditions of possibility of expertise, which depends on the accumulation of positions and sources of revenue. As revealed by press articles on parliamentary questions, the undercurrents of the "Rueff affair" thus show that international circulation does not take place without resistance.