Radio Regulations
Source: the Radio Regulations published by the International Telecommunication Union (ITU).
5.28
Other
5.28 3) Stations of a secondary service:
Frequency bands (0)
No band in the catalogue carries this footnote — usually because the conference struck it out.
Version history
The wording adopted at each conference, newest first.
WRC-23
No change
Current text
5.28 3) Stations of a secondary service:
WRC-19
No change
Current text
5.28 3) Stations of a secondary service:
WRC-15
No change
Current text
5.28 3) Stations of a secondary service:
WRC-12
No change
Current text
3) Stations of a secondary service:
WRC-07
Created
Current text
5.28 3) Stations of a secondary service:
Source: ITU Radio Regulations, editions of 2008, 2012, 2016, 2020 and 2024. The English, French and Spanish texts are each taken from the official edition in that language, not translated from one another. Sources and citation.