With the purpose of reflecting on the importance of a complementary and addedvalue approach to the development of the African peace and security architecture (APSA) in its continental dimension, this chapter presents and reflects on the process by which the Common Market for Eastern and Southern Africa (COMESA) has put in motion the design and implementation of a sui generis early warning capability, in the guise of COMWARN. This is a particularly useful focus as regards the testing of some of the legal and normative principles that underscore the APSA as a continental architecture reliant on the RECs as integral components: subsidiarity, coordination and harmonization, and, finally, division of labor and optimal resource utilization by an explicit attempt at avoiding the duplication of tasks (Engel and Gomes Porto 2010).