In 1957, the Agency for the Control of Armaments (ACA) publishes the report of its first year’s activities (in 1956) in the field of arms control. The scope for experimental action determined by the Council has led the ACA to carry out documentary controls and on-site inspections of the forces under the command of the North Atlantic Treaty Organisation (NATO). In its conclusions, the ACA notes that the experience acquired during this first year confirms that it will be in a position to perform its tasks as laid down in Protocol IV of the modified Brussels Treaty and that, given the limited resources at its disposal, the Agency hopes to be able to cooperate with national authorities.