7a604b23_agement_and_Telecommunications_Glossary_Definition
[Term] Occupied bandwidth [Definition] 
The width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted are each equal to 0.5% of the emitted power. This is also known as the 99% emission bandwidth. For transmitters in which there are multiple carriers, contiguous or non-contiguous in frequency, the occupied bandwidth is to be the sum of the occupied bandwidths of the individual carriers.
RSS-Gen — General Requirements for Compliance of Radio Apparatus - Spectrum Management and Telecommunications