»The Principle of Non-Refoulement and its Interpretation by the UN Treaty Bodies«: This research provides the first comprehensive overview of the United Nations Human Rights Treaty Bodies' practice on the human rights principle of non-refoulement. Non-refoulement, although a long-existing element of international law, has been continuously challenged. Claims concerning non-refoulement are raised before the Treaty Bodies in great numbers. This research examines the Treaty Bodies' contribution to the development of the principle of non-refoulement in international human rights law and shows their influence on customary international law developments.