The 18 GHz band is globally harmonised through the International Telecommunication Union's Recommendation ITU-R F.595 for microwave technology.

ITU-R F.595 defines radio-frequency channel arrangements for fixed wireless systems operating in the 17.7 to 19.7 GHz frequency band. Each country develops its own specific operating conditions based on the global ITU-R recommendation, covering information such as antenna sizing, minimum distance requirements, and geographic coordination.