Related Rule
Greece
Practice Relating to Rule 37. Open Towns and Non-Defended Localities
The Hellenic Navy’s International Law Manual (1995) provides:
1. … [T]he provisions of the otherwise obsolete IX Hague Convention concerning the respect and protection of the victims of armed conflict should be considered as bearing a perpetual binding effect.
2. To the above effect, the significance of the codified text of IX Hague Convention is great and the following provisions should be applied by the belligerents:
a. The prohibition of bombardment of undefended ports, towns, villages, dwellings or buildings (art.1). 
Greece, International Law Manual, Hellenic Navy General Staff, Directorate A2, Division IV, 1995, Chapter 7, Part II, §§ 1–2.