In 1963, the Agency for the Control of Armaments (ACA) of Western European Union (WEU) publishes its report for 1962, the seventh year of controls, pursuant to Article VII of Protocol IV. This report is the first to contain a section on ‘Atomic weapons’. According to the ACA, some problems are influencing the assessment of arms levels; moreover, the Agency does not have a qualified expert who specialises in general scientific and technical nuclear issues in relation with military uses. Nevertheless, the report concludes that the documentary and on-site controls carried out indicate that appropriate levels of weapons are being inspected. The year 1962 confirms the ongoing adaptation of the ACA to its tasks.