According to the Protocol to the African Charter on Human and Peoples� Rights establishing the African Court on Human and Peoples� Rights, the main function of the Court is to complement the protective mandate of the already existing African Commission on Human and Peoples� Rights. Thus, complementarity was introduced into the framework of the African human rights system. Since then, the concept of complementarity has also been brought into play in the Protocol to the Statute of the proposed African Court of Justice and Human Rights. Although the interim rules of procedure of the Court and of the Commission have sought to give meaning to the concept of complementarity, there is still very little understanding of how it will pan out in the system. Questions abound as to the exact implication it would have on the existing mechanisms of the Commission. Almost nothing has been said or written on its impact on the African Committee of Experts on the Rights and Welfare of the Child. Against this background, this article argues that complementarity in the African human rights system can be applied positively by adopting a normative approach that allows for the prescription of what the system's supervisory institutions should do and how they should relate to each other in their work. The article argues further that the justifications for the introduction of judicial organs can also be employed to prescribe complementary functions for each supervisory institution. It concludes that applying complementarity positively would require encouraging each institution to focus on its strengths with a view to strengthening the overall effectiveness of the system.