The Executive and Liaison Committee of the Universal Postal Union (UPU) met in Berne, Switzerland, from May 15 to 20, 1961, preceded by meetings of several sub committees. Discussion was devoted chiefly to examining the reports of the various subcommittees, the recommendations of which were generally accepted, and to formulating proposals for the consideration of the congress meeting one year hence. As there was considerable hesitation regarding a system proposed by Switzerland in the Tariffication Subcommittee for the treatment of unprepaid or insufficiently prepaid mail, the Executive and Liaison Committee asked the subcommittee to reconsider the question in order to find out if the Swiss system could be applied generally by all member countries before recommending it to the congress. In view of its acceptance of all the recommendations of the Technical Assistance Development Subcommittee, the committee entrusted to the International Bureau, its administrative agent, the task of carrying out a supplementary inquiry into the technical assistance system of the UN and of the International Telecommunications Union (ITU), with a view to submitting the results to the 1962 session of the subcommittee.