In our concept, judicialization means that international dispute settlement procedures increasingly incorporate the normative principle of impartiality, i.e. the principle of a comparable treatment of comparable breaches of law. We use a graded scale ranging from purely diplomatic to predominantly judicial procedures to assess the degree of judicialization of any given dispute settlement procedure. From our institutionalist point of view, it is entirely an empirical question whether – and if so when – judicialized dispute settlement procedures lead to a corresponding practice of judicialized dispute settlement. For this reason we analyze in a second step the corresponding practice of dispute settlement. The degree of judicialization of the dispute settlement procedure within the framework of the United Nations Security Council remains low. Nonetheless, our comparison of the periods 1974-1983 and 1990-1999 suggests so far an increasing judicialization of the dispute settlement practice within the Security Council.