Règle correspondante
Germany
Practice Relating to Rule 131. Treatment of Displaced Persons
Section A. Provision of basic necessities
Germany’s Military Manual (1992) provides: “If an evacuation is necessary, the occupying power shall provide for sufficient accommodation and supply.” 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten KonfliktenHandbuch, August 1992, § 545.
In 2005, in its Seventh Human Rights Policy Report submitted to the Bundestag (Lower House of Parliament), Germany’s Federal Government stated:
With the 1998 guidelines on the handling of crises related to internally displaced persons (“Guiding Principles on Internal Displacement”) by the then Representative of the UN Secretary-General on the Human Rights of Internally Displaced Persons, Francis Deng, the international community has a practice-oriented document, which summarizes existing standards on the protection of internally displaced persons and gives further recommendations. Although these guiding principles are not a binding instrument under international law, their acceptance by States, international organizations and NGOs has continued to grow over the past years, so that now they are virtually regarded as customary international law. 
Germany, Federal Government, Seventh Human Rights Policy Report, 17 June 2005, pp. 97–98.