This article is about a relatively new version of the ‘emerging’ jus post bellum concept. It asks whether the jus post bellum as ‘integrity’ is useful as a normative guide in the interpretation of international criminal law during transitions when the requirements of international criminal law are ambiguous or unclear. It develops the main elements of the jus post bellum as integrity as an analytical framework. It then evaluates the theoretical and practical application of the concept in relation to the task of the International Criminal Court in evaluating the ‘alternative sentences’ regime in Colombia. It argues that a Dworkinian approach to international criminal law must make certain assumptions about the international legal order which are difficult to sustain. The difficulties discussed here are related to the structural conditions needed for a ‘community of principle’ to arise in Dworkin’s theory. The article demonstrates that the jus post bellum as integrity may be useful for identifying the principles of international criminal law that should apply to states in transition from conflict to peace. However, despite its usefulness, the concept is susceptible to the usual arguments against adopting ‘natural law’ constructions in international legal method (and post-conflict law).