The increasing number of natural and man-made disasters and the growing intensity of such events more frequently exceed the affected countries national capacities to provide the needed aid. International Organizations supporting those countries are facing challenges not only originating in the devastation due to the disaster but also numerous legal issues. This diploma thesis addresses selected topics of International Disaster Response Law such as international relief organizations personnel, the importation of relief items as well as issues of international law and its position in IDRL. The various binding and non-binding legal documents of IDRL are examined and the significant differences between industrialized countries and least developed countries regarding the willingness to implement international standards in domestic laws is being looked at. The occurring question if industrialized countries even need rules of IDRL is being discussed. On the basis of two natural disasters in Indonesia and the United States of America, their national regulations and the, based on the problems arose, drawn conclusions are evaluated. Due to the adopted domestic regulations and established institutions, Indonesia is attributed a lead role in the implementation of domestic IDRL frameworks. The two case studies show the necessity of IDRL, irrespective of a countrys economic strength. The current Draft Articles on the Protection of Persons in the Event of Disasters, developed by the United Nations International Law Commission, could if passed as a binding framework convention help taking the development of IDRL the necessary important step forward.