A. INTRODUCTION Having established when problems of succession arise between international organizations, we turn now to the question of how devolution legally takes place, that is the principles and rules of international law that govern succession. One conclusion we reached earlier about the concept of succession is that it results either from an agreement between the predecessor and the successor, which is usually called 'conventional succession', or by operation of the law when certain conditions are fulfilled, which is commonly referred to as 'automatic succession';' In this chapter we will examine these two basic types of succession in the practice of international organizations.