On 27 March 1975, the Information and Analysis Division (Division I) of the Agency for the Control of Armaments (ACA) sends a note to its director on the control of atomic weapons. The note points out that there are no quantitative controls or controls on non-production of atomic weapons on the European mainland, for both American and French nuclear weapons. Division I concludes by speculating on the definition of an atomic weapon within the meaning of the treaty and would like further information on this matter.