§ 134. Appropriation of public immoveables is not lawful so long as the territory on which they are has not become State property of the occupant through annexation. During mere military occupation of the enemy territory, a belligerent may not sell or otherwise alienate public enemy land and buildings, but only appropriate the produce of them. Article 55 of the Hague Regulations expressly enacts that a belligerent occupying enemy territory shall only be regarded as administrator and usufructuary of the public buildings, real property, forests, and agricultural works belonging to the hostile State and situated on the occupied territory; that he must protect the stock and plant, and that he must administer them according to the rules of usufruct. He may, therefore, sell the crop from public land, cut timber in the public forests and sell it, may let public land and buildings for the time of his occupation, and the like. He is, however, only usufructuary, and he is, therefore, prohibited from exercising his right in a wasteful or negligent way that would decrease the value of the stock and plant. Thus, for instance, he must not cut down a whole forest unless the necessities of war compel him. [Sidenote: Immoveable Property of Municipalities, and of Religious, Charitable, and the like Institutions.] § 135. It must, however, be observed that the produce of such public immoveables only as belong to the State itself may be appropriated, but not the produce of those belonging to municipalities or of those which, although they belong to the hostile State, are permanently set aside for religious purposes, for the maintenance of charitable and educational institutions, and for the benefit of art and science. Article 56 of the Hague Regulations expressly enacts that such property is to be treated as private property. [Sidenote: Utilisation of Public Buildings.] § 136. So far as the necessities of war demand, a belligerent may make use of public enemy buildings for all kinds of purposes. Troops must be housed, horses stabled, the sick and wounded nursed. Public buildings may in the first instance, therefore, be made use of for such purposes, although they may thereby be considerably damaged. And it matters not whether the buildings belong to the enemy State or to municipalities, whether they are regularly destined for ordinary governmental and municipal purposes, or for religious, educational, scientific, and the like purposes. Thus, churches may be converted into hospitals, schools into barracks, buildings used for scientific research into stables. But it must be observed that such utilisation of public buildings as damages them is justified only if it is necessary. A belligerent who turned a picture gallery into stables without being compelled thereto would certainly commit a violation of the Law of Nations. [Sidenote: Moveable Public Property.]