This chapter deals with the law on the internal matters of international organizations, and more particularly, with the relations between organs of an international organization. Issues include, among others, the power of self-regulation, financial relations between organs of an organization, the creation of subsidiary organs and the applicable legal rules thereto, as well as analysis of various procedures that require the collaboration between different organs of the same organization.1 The chapter will not deal with the legal relations between an international organization and its civil servants. It will equally steer clear of the legal relationships between organizations and their member states, third parties or other international organizations.