Соответствующая норма
Italy
Practice Relating to Rule 1. The Principle of Distinction between Civilians and Combatants
Section B. Attacks against combatants
According to Italy’s IHL Manual (1991), armed forces may be attacked. 
Italy, Manuale di diritto umanitario, Introduzione e Volume I, Usi e convenzioni di Guerra, SMD-G-014, Stato Maggiore della Difesa, I Reparto, Ufficio Addestramento e Regolamenti, Rome, 1991, Vol. I, § 12.
Italy’s LOAC Elementary Rules Manual (1991) states: “Combatants may participate directly in hostilities and may be attacked.” 
Italy, Regole elementari di diritto di guerra, SMD-G-012, Stato Maggiore della Difesa, I Reparto, Ufficio Addestramento e Regolamenti, Rome, 1991, § 8.
According to Italy’s Law of War Decree (1938), as amended in 1992, armed forces may be attacked. 
Italy, Law of War Decree, 1938, as amended in 1992, 1938, Article 40.
Upon ratification of the 1977 Additional Protocol I, Italy declared:
The first sentence of paragraph 2 of [Article 52] prohibits only such attacks as may be directed against non-military objectives. Such a sentence does not deal with the question of collateral damage caused by attacks directed against military objectives. 
Italy, Declarations made upon ratification of the 1977 Additional Protocol I, 27 February 1986, § 8.