A timely analysis of State complicity in international law, which takes an innovative rule-of-law perspective.

1. Introduction; 2. Complicity between bilateralism and community interest; 3. Complicity and the international rule of law; 4. Complicity in customary international law; 5. The concept of complicity in Article 16 ASR; 6. The consequences of complicity; 7. Complicity and aggravated responsibility; 8. A network of rules on complicity; 9. Concluding observations.

Helmut Philipp Aust is a Senior Research Fellow at the Humboldt-Universität zu Berlin.