Related Rule
Italy
Practice Relating to Rule 14. Proportionality in Attack
Section B. Determination of the anticipated military advantage
At the CDDH, Italy stated: “As to the evaluation of the military advantage expected from an attack … that expected advantage should be seen in relation to the attack as a whole, and not in relation to each action regarded separately.” 
Italy, Statement at the CDDH, Official Records, Vol. VI, CDDH/SR.42, 27 May 1977, p. 231.
Upon ratification of the 1977 Additional Protocol I, Italy stated that the term “military advantage” as used in the proportionality test of Articles 51 and 57 of the Protocol was understood to refer to the advantage anticipated from the attack considered as a whole and not only from isolated or particular parts of the attack. 
Italy, Declarations made upon ratification of the 1977 Additional Protocol I, 27 February 1986, § 6.