The heads of state and government of the East African sub-region established a forum known as the Inter-Governmental Authority on Development (IGAD) for expanded cooperation in 1996. The conclusion of the treaty by which IGAD was created was the beginning, not the end, of commitment to IGAD through the principle of pacta sunt servanda [agreements are binding and must be implemented in good faith]. In spite of the great hopes, optimism and aspirations placed on the creation of IGAD, the challenge then become IGAD members' commitment to the treaty establishing IGAD. If member states are unable to grant powers to IGAD and cooperate to enable IGAD to execute its objectives, IGAD cannot work as was intended, hence it remains open to questions. This article discusses IGAD's fundamental features and the institutional progress it has achieved, as well as the challenges it faces as an international legal body.