On 21 July 1948, the International Committee of Movements for European Unity (ICMEU) questions Ernest Bevin, British Foreign Minister, on the United Kingdom's position concerning the creation of a European Assembly.
On 6 April 1951, in order to clear up any misunderstandings about the implications of the Schuman Plan for Belgium, the Walloon Economic Council clarifies the scope of some of the provisions of the draft Treaty establishing the European Coal and Steel Community.
On 30 July 1951, the Socialist Parties of Belgium, France, Germany, Italy, the Netherlands and Luxembourg adopt a draft joint declaration on the conditions which must be met if the European Coal and Steel Community (ECSC) is to succeed.
On 30 July 1951, the Belgian delegation asks all the Socialist Members of Parliament of the Six to debate the implications of the Treaty establishing the European Coal and Steel Community (ECSC) with a view to the establishment of a common position during the parliamentary debates concerning the ratification thereof.
On 26 November 1957, during the parliamentary debates in the Belgian Senate, Fernand Dehousse, a Socialist Senator from Liège and a fervent European federalist, sets out in detail why he is in favour of the Senate’s ratifying the Treaties establishing the European Economic Community (EEC) and the European Atomic Energy Community (EAEC or Euratom).
Constitué le 22 octobre 1958, le "Groupe de travail pour les élections européennes" a pour tâche d'étudier les difficultés relatives à l'organisation de l'élection de l'Assemblée parlementaire européenne au suffrage universel direct. En février 1959, le quotidien belge Le Soir reprend les explications du président du groupe de travail, Fernand Dehousse, justifiant un délai particulièrement long pour les travaux à peine amorcés.
At the 27th sitting of the Standing Committee of the Treaty of Brussels held in London on 2 September 1948, the representatives of the governments of the five Powers adopt a position on the memorandum from the International Committee of the Movements for European Unity, dated 18 August 1948, with a view to the establishment of a European Assembly.
On 17 May 1960, the European Parliamentary Assembly adopts the Resolution on the adoption of a draft convention on the election of the Members of the European Parliamentary Assembly by direct universal suffrage and other related texts. The Resolution incorporates the draft convention drawn up by the Working Party on European Elections under the chairmanship of Fernand Dehousse.
On 6 and 7 May 1957, members of the Action Committee for the United States of Europe (ACUSE) meet at the Hjalmar Branting Institute in Paris in order to discuss the European Common Market and Euratom. In this photo, the following may be seen: Fernand Dehousse, Belgian Socialist Senator and Member of the Consultative Assembly of the Council of Europe; Antoine Pinay, former President of the French Council; Jean Monnet, President of ACUSE; Françoise Schonfeld, Secretary of ACUSE; and Max Kohnstamm, Secretary-General of ACUSE.
Entrusted to an American engineering consultancy firm by the Economic Cooperation Administration (ECA), a body responsible for monitoring the use made of Marshall aid in Europe, the Robinson Report, published in May 1950, strongly criticises the management of the Belgian coal mines and advocates their modernisation.