asked the Under-Secretary of State for War why the Regulation made at the Hague Conference of 1899, on the proposition of Great Britain, prohibiting the use of projectiles and explosives from aircraft is not now acted upon by Great Britain, at least in cases where the enemy does not employ aircraft?

I have been asked to reply. The Hague Declaration of 1907, which replaced the expired Declaration of 1899, prohibits the discharge of projectiles and explosives from balloons or by other new methods of a similar nature, but it applies only to wars in which parties to the Declaration are alone engaged; and very few Powers have in fact ratified it. The fact that a State does not itself em- ploy aircraft in no way affects the right to use against it projectiles and explosives dropped from aircraft.