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Benin
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section E. Attacks against civilian means of transportation
Benin’s Military Manual (1995) states:
Foreign civilian aircraft may be attacked when escorted by enemy military aircraft. When flying alone they can be ordered to modify their route or to land or alight on water for inspection … If a foreign civilian aircraft refuses to modify its route or to land or alight on water, it may be attacked after due warning. 
Benin, Le Droit de la Guerre, III fascicules, Forces Armées du Bénin, Ministère de la Défense nationale, 1995, Fascicule II, p. 8.