Соответствующая норма
Indonesia
Practice Relating to Rule 29. Medical Transports
Indonesia’s Air Force Manual (1990) states that medical aircraft must not be attacked, provided they fly on routes, heights and at times agreed between belligerents. The manual further states that medical aircraft lose their immunity if they are used for purposes other than the transportation of the wounded, medical personnel or medical equipment. 
Indonesia, The Basics of International Humanitarian Law in Air Warfare, Indonesian Air Force, 1990, § 36.
The manual also states that no immunity is provided to medical aircraft which enter a war zone or enemy controlled territory without prior authorization or without agreement between the parties to the conflict or when they ignore instructions given by the parties to the conflict. 
Indonesia, The Basics of International Humanitarian Law in Air Warfare, Indonesian Air Force, 1990, § 46.