Соответствующая норма
Practice Relating to Rule 65. Perfidy
Section H. Simulation of protected status by using other internationally recognized emblems
The Hellenic Navy’s International Law Manual (1995) provides that ”the misuse of … the protective signs for cultural objects” constitutes perfidy. 
Greece, International Law Manual, Hellenic Navy General Staff, Directorate A2, Division IV, 1995, Chapter 5, § 4.