that the definitions of necessary and occupied bandwidth and allocated band are reported in Nos. 1.152, 1.153 and 1.16 of the Radio Regulations (RR) respectively
ITU-R F.1191-2-2001 history
2011ITU-R F.1191-2011 Necessary and occupied bandwidths and unwanted emissions of digital fixed service systems
2001ITU-R F.1191-2-2001 Bandwidths and Unwanted Emissions of Digital Fixed Service Systems