Constitutional and supreme courts frequently end up examining the political and legal questions at the heart of peace agreements and post-conflict constitutions. Where a peace agreement has included territorial self-government (TSG) provisions courts are often endowed with the capacity to adjudicate disputes between state and sub-state levels of government. The effectiveness of courts in fulfilling this role as not been comprehensively examined. This article fills this important gap examining whether the results of existing research on the role of constitutional and supreme courts in resolving disputes in traditional federalism also apply in these particular circumstances. It finds that where TSG is used as a conflict management mechanism judicial review can have centralizing tendencies if this occurs it can largely be attributed to the processes used to select though the devolutionary multinational nature of the states is also relevant.