Соответствующая норма
Practice Relating to Rule 145. Reprisals
Section E. Termination of reprisals as soon as the adversary complies again with the law
Italy’s IHL Manual (1991) states: “When the belligerent enemy who committed the unlawful act … has given proper satisfaction, each justification to continue or take [measures of reprisal] stops.” 
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, § 24.