The ITU Radiocommunication Assembly, considering a) that the international exchange of monophonic and stereophonic sound programmes between broadcasting organizations, recorded in analogue form, may be made by means of b) that it is desirable to limit the number of standards and formats in which such recordings may be exchanged; c) that such exchanges would be facilitated by the use of uniform and widely accepted specifications and operating practices; d) the content of Resolution ITU-R 41 - Collaboration with the International Organization for Standardization (ISO) and the international Electrotechnical Commission (IEC) on broadcasting technologies, - magnetic recordings on tape; recommends 1 that, when such recorded sound programmes are exchanged in the form of analogue magnetic recordings on tape, the exchanges should be effected by means of 6.3 mm wide tapes (nominal value), recorded at a speed of 38.1 cmis or 19.05 cmís, conforming with IEC Publication 94-1 (the "IEC-1" recording characteristics of IEC Publication 94-1 is preferred); 2 that the maximum diameter of exchanged full spools should be 290 mm (1 1.5 in.) for Type I spools and 267.5 mm (10.5 in.) for Type II spools (see IEC Publication 94-1); 3 that the operating practices and additional requirements detailed below should be used for such recorded sound programme exchanges.