At a meeting of senior officials of the seven-nation European Free Trade Association (EFTA) held in London, February 12–13, 1960, the organization was reported to have chosen Geneva as the site of its headquarters, after the French government had informed it that it could not accept the proposal that Paris be the site, since France was not a member of EFTA. Although EFTA did not officially come into being until May 3, 1960, with the deposition of the seven instruments of ratification with the Swedish government, the preparatory meeting of its Ministerial Council was held in Vienna on March 11–12, devoting itself principally to an examination of the most important problem facing this new organization—namely, its relations with third countries, especially those of the European Economic Community (EEC). The member states declared their readiness to discuss with the EEC members the possible extension to the Six and to other countries, subject to reciprocity, of the 20-percent tariff reduction effective among themselves on July 1, 1960, and reaffirmed the importance of a continuation of European economic cooperation within the framework of the Organization for European Economic Co-operation (OEEC), of which they would like to see the United States and Canada become full members. Also in March, EFTA members reportedly received the assurance of the United States government that its approval of a recent decision of EEC, concerning the reduction of its external tariff on July 1, 1960, did not reflect any animosity toward the Association.