https://dod.defense.gov/Portals/1/Documents/pubs/DoD%20Law%20of%20War%20Manual%20-%20June%202015%20Updated%20Dec%202016.pdf?ver=2016-12-13-172036-190

11.4.1 Right of the Occupying Power to Govern the Enemy Territory Temporarily. The right to govern the territory of the enemy during its military occupation is one of the incidents of war.93 By the fact of occupation (i.e., the Occupying Power’s established power over occupied territory), the Occupying Power is conferred the authority to exercise some of the rights of sovereignty.94 The exercise of these sovereign rights also results from the necessity of maintaining law and order, indispensable both to the inhabitants and to the occupying force, and the failure or inability of the legitimate government to exercise its functions, or the undesirability of allowing it to do so.95

Interdasting