Ius ad bellum refers to the international law regulating the resort to force, while ius in bello is a synonym for international humanitarian law, and refers to the international law regulating behaviour in war. Today, the use of force between States is prohibited by a peremptory rule of international law: ius ad bellum has changed into ius contra bellum.
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BIBLIOGRAPHIC RESOURCES
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Humanitarian Rules to be Respected in Warfare: Crucial or Outdated?”, in SCHMITT Michael & PEJIC Jelena (eds), International Law and Armed Conflict: Exploring the Faultlines, Essays in Honour of Yoram Dinstein, M. Nijhoff, Leiden/Boston, 2007, pp. 242-264.
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