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Uruguay
Practice Relating to Rule 37. Open Towns and Non-Defended Localities
Uruguay’s Law on Cooperation with the ICC (2006) states:
26.2. Persons and objects affected by the war crimes set out in the present provision are persons and objects which international law protects in international or internal armed conflict.
26.3. The following are war crimes:
13. Attacking or bombarding, by whatever means, towns, villages, dwellings or buildings which are undefended and which are not military objectives. 
Uruguay, Law on Cooperation with the ICC, 2006, Article 26.2 and 26.3.13.