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Egypt
Practice Relating to Rule 37. Open Towns and Non-Defended Localities
In its written comments on other written statements submitted to the ICJ in the Nuclear Weapons case in 1995, Egypt declared: “The attack or bombardment, by whatever means, of towns, villages, dwellings, or buildings which are undefended is prohibited.” 
Egypt, Written comments on other written statements submitted to the ICJ, Nuclear Weapons case, September 1995, p. 21, § 50.
According to the Report on the Practice of Egypt, “Egypt thinks that protection of open towns [and] undefended areas … consists in refraining from launching attacks against … these areas”, which implies that “attacks against such places are prohibited”. 
Report on the Practice of Egypt, 1997, Chapter 1.8.