The chapter deals with the political context of NTA arrangements, with focus on the actors involved in such arrangements, the conditions the actors have to meet, the political decisions they need to make, the legal and institutional consequences of those decisions, and, finally, the social and political costs of the arrangements and the criteria of success. Given that NTA arrangements are manifold, the issued addressed in the chapter are detailed with regard to each sub-type or form of manifestation. The approach is mainly descriptive and empirical, but since there are gaps between the ideal type and examples of practical implementation, normative considerations/recommendations are also part of the argument outlined by the chapter.