paid in cash for all requisitions they made. The usual practice at the end of the nineteenth century was that commanders always gave a receipt for contributions, and that they either paid in cash for requisitions or acknowledged them by receipt, so that the respective inhabitants could be indemnified by their own Government after conclusion of peace. However, no restriction whatever was imposed upon commanders with regard to the amount of contributions and requisitions, and with regard to the proportion between the resources of a country and the burden imposed. The Hague Regulations have now settled the matter of contributions and requisitions in a progressive way by enacting rules which put the whole matter on a new basis. That war must support war remains a principle under these regulations also. But they are widely influenced by the demand that the enemy State as such, and not the private enemy individuals, should be made to support the war, and that only so far as the necessities of war demand it should contributions and requisitions be imposed. Although certain public moveable property and the produce of public immoveables may be appropriated as heretofore, requisitions must be paid for in cash or, if this is impossible, acknowledged by receipt. [Footnote 286: Concerning the controversy as to the justification of Requisitions and Contributions, see Albrecht, _op. cit._ pp. 18-21.] [Footnote 287: An excellent sketch of the historical development of the practice of requisitions and contributions is given by Keller, _Requisition und Kontribution_ (1898), pp. 5-26.] [Sidenote: Requisitions in Kind, and Quartering.]