On 29 September 1966, the Agency for the Control of Armaments (ACA) of Western European Union (WEU) issues a note which sets out the consequences that France’s withdrawal from the integrated military structure of the North Atlantic Treaty Organisation (NATO) may have for WEU with regard to armaments control by the Agency. The note mentions France’s commitments under the Modified Brussels Treaty, confirmed by the State Secretary for Foreign Affairs during the 296th meeting of the Council on 27 and 28 June 1966, and refers to the applicable provisions in the various fields of control, including the special case of atomic, biological and chemical (ABC) weapons.