Paragraph 4 F1F2

The mategriel and buildings of military units permanently assigned to civil defence organisations and exclusively devoted to the performance of civil defence tasks shall, if they fall into the hands of an adverse Party, remain subject to the laws of war. They may not be diverted from their civil defence purpose so long as they are required for the performance of civil defence tasks, except in case of imperative military necessity, unless previous arrangements have been made for adequate provision for the needs of the civilian population.