On 20 November 1948, the Moniteur belge publishes the statutes of the European League for Economic Cooperation (ELEC), a European study and lobby group with Liberal roots, established on 24 March 1947 under the name of the Independent League for European Cooperation (ILEC).

In his memoirs, Joseph Retinger, one of the founder members of the European Movement, describes the circumstances surrounding the creation of the European League for Economic Cooperation (ELEC) and the first actions taken by the organisation.

On 16 March 1951, Paul van Zeeland, Belgian Minister for Foreign Affairs and Trade and the principal driving force in the European League for Economic Cooperation (ELEC), delivers a heartfelt plea for the creation of a genuine united Europe.

From 29 to 31 January 1953, the European League for Economic Cooperation (ELEC) organises in Brussels an international conference on monetary issues, at the end of which it adopts a resolution which emphasises in particular the importance of the free convertibility of currencies for the establishment of a European common market.

On 31 January 1953, in Brussels, Jelle Zijlstra, Netherlands Foreign Minister, gives the closing address to the Conference of the European League for Economic Cooperation (ELEC).

On 22 June 1956, at the third international conference of the European League for Economic Cooperation (ELEC), Johannes Linthorst Homan, Director for European Integration in the Netherlands Foreign Ministry, emphasises the importance of the League for European economic integration.