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  • Online publication date: November 2014

1 - A positive approach to complementarity: the impact of the Office of the Prosecutor

from PART I - General reflections

Summary

This chapter outlines the policies and practice of the Office of the Prosecutor on complementarity. It argues that complementarity has two dimensions: an admissibility dimension and a second, related dimension, ‘positive complementarity’. Due to its mandate, the ICC will deal only with a few cases over the years. But the impact of its cases and rulings (the ‘shadow of the law’) extends to a multiplicity of entities, including States Parties and non-states parties. The purpose, efforts and the impact of the Court are thus indicative of progress towards establishing a global criminal justice system.

The Rome Statute as the foundation of a global criminal justice system

The goal of the Rome Statute is to end impunity for the most serious crimes of concern to the international community as a whole and to contribute to their prevention. To achieve its goal of holding accountable the perpetrators of such crimes, the Statute created an interdependent, mutually reinforcing system of justice with a permanent International Criminal Court (ICC) complementary to national criminal jurisdictions. The Statute, in its Preamble, recalls ‘the duty of every State to exercise its criminal jurisdiction over those responsible for international crimes’, thereby giving states the primary responsibility for preventing and punishing atrocities. Proceedings before the ICC, as court of last resort, should remain an exception to the norm.

Kleffner, J., Complementarity in the Rome Statute and National Criminal Jurisdictions (2009)
Stahn, C., ‘Complementarity: A Tale of Two Notions’ (2008) 19 Crim. LF87
ICC-OTP, Paper on Some Policy Issues Before the Office of the Prosecutor (September 2003) (‘Policy Paper’), available at
ICC-OTP, Report on Prosecutorial Strategy (14 September 2006), available at
Mnookin, R. H. and Kornhauser, L., ‘Bargaining in the Shadow of the Law: The Case of Divorce’ (1979) 88 Yale LJ950