Related Rule
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section E. Attacks against civilian means of transportation
In a communiqué issued in 1973, the Belgian Government condemned the deliberate destruction of a Libyan Boeing by Israeli air force units because it “condemns all violence of which innocent civilians are the victims”. 
Belgium, Government communiqué, 22 February 1973, RBDI, Vol. XI, 1975, p. 375.