Interest towards membership of the European Communities (EC) developed in Ireland during the 1950s, with consideration also given to membership of the European Free Trade Area. As the United Kingdom intended on EC membership, Ireland applied for membership in July 1961 due to the substantial economic linkages with the United Kingdom. However, the founding EC members remained skeptical regarding Ireland's economic capacity, neutrality, and unattractive protectionist policy. Many Irish economists and politicians realised that economic policy reform was necessary. The prospect of EC membership became doubtful in 1963 when French President General Charles de Gaulle stated that France opposed Britain's accession, which ceased negotiations with all other candidate countries. However, in 1969 his successor, Georges Pompidou, was not opposed to British and Irish membership. Negotiations began and in 1972 the Treaty of Accession was signed. A referendum was held later that year which confirmed Ireland's entry into the bloc, and it finally joined the EC as a member state on 1 January 1973.