The field of Humanitarian Assistance has become increasingly complex in every aspect. Since the end of the cold war one can observe multiple changes – increase in humanitarian action, increased number and variation of humanitarian actors, proliferation of tasks between different actors (e.g. militaries as relief and developmental actors), professionalization of relief aid, etc. Bluntly speaking, the times when the Red Cross and States were the only humanitarian actors and when international humanitarian law alone was sufficiently covering emergency situations, are long gone. All these developments were accompanied by a slow adaptation of international (humanitarian) and regional law. The fact that the International Federation of the Red Cross and Red Crescent (IFCR) is developing a corpus of cases, legal case studies and legal documents relevant for emergency situations, what is called international disaster response law, shows that a coherent body of law is far from being in existence. The legal reality of international law pertaining to emergency response is rather broadly spread over various international legal fields and related documents. International humanitarian law (IHL) is far from covering the subject of humanitarian aid, beginning with the fact that it covers only armed conflicts and not purely natural disasters.