ITU-T X.180-1989 Administrative Arrangements for International Closed User Groups (CUGs) - Data Communication Networks - Transmission, Signalling and Switching, Network Aspects, Maintenance and Administrative Arrangements (Study Group VII) 3 pp
It is assumed that in a CUG of an international organization the headquarters branch probably will be the responsible subscriber,
ITU-T X.180-1989 history
1989ITU-T X.180-1989 Administrative Arrangements for International Closed User Groups (CUGs) - Data Communication Networks - Transmission, Signalling and Switching, Network Aspects, Maintenance and Administrative Arrangements (Study Group VII) 3 pp