True. But it is also true that occupying force is responsible to establish order and prevent exactly such events. From the article it seems that it was provided for 30 minutes and it did have effect.
1907 Hague Convention
Article 43
The authority of the legitimate power having actually passed into the hands of the occupant, the latter shall take all steps in his power to re-establish and insure, as far as possible, public order and safety, while respecting, unless absolutely prevented, the laws in force in the country.
Article 56
The property of the communes, that of religious, charitable, and educational institutions, and those of arts and science, even when State property, shall be treated as private property. All seizure of, and destruction, or intentional damage done to such institutions, to historical monuments, works of art or science, is prohibited, and should be made the subject of proceedings.