Related Rule
Italy
Practice Relating to Rule 22. The Principle of Precautions against the Effects of Attacks
Section A. Precautions to protect the civilian population, civilians and civilian objects
Italy’s LOAC Elementary Rules Manual (1991) states:
To restrict civilian casualties and damage, the means of combat and weapons shall be adapted to the environment of the defence position … When the mission permits, appropriate information and warning shall be given of defence measures endangering civilian persons, so that they can behave accordingly in the event of combat action. 
Italy, Regole elementari di diritto di guerra, SMD-G-012, Stato Maggiore della Difesa, I Reparto, Ufficio Addestramento e Regolamenti, Rome, 1991, § 61.